gamma
gamma — 名詞
1. the name and written symbol (Γ, γ) of the third character in the Greek writing s
伽瑪
希臘字母第三個字
the name and written symbol (Γ, γ) of the third character in the Greek writing system, used widely in mathematics and science to represent angles, constants, and other values
In her Greek language class, Mei learned that the letter gamma comes third, right after alpha and beta.
Mei 在希臘文課上學到 gamma 是第三個字母，排在 alpha 和 beta 之後。
third letter in Greek alphabet sequence
During the physics exam, Priya used a small gamma to label the second angle.
物理考試時，Priya 用一個小寫 gamma 來標示第二個角。
The alphabet chart on page five of Theo's Greek textbook shows alpha, beta, and gamma as the first three letters.
Theo 的希臘文課本第五頁的字母表列出 alpha、beta 和 gamma 為前三的字母。
Before his Greek test, Kofi practiced writing the uppercase gamma and the lowercase gamma on his notebook.
希臘文測驗前，Kofi 在筆記本上練習書寫大寫 gamma 和小寫 gamma。
文法句型
the letter gamma
gamma as a symbol
2. a powerful form of energy that travels through space as invisible waves, given o
伽瑪射線
高能量電磁輻射
a powerful form of energy that travels through space as invisible waves, given off by radioactive materials, nuclear reactions, and certain events in space; used in medicine to treat cancer and in factories to kill harmful germs
The hospital uses gamma rays to shrink tumours without cutting open the body.
醫院使用伽瑪射線來縮小腫瘤，無需切開身體。
gamma rays in medical treatment
Thick lead walls are needed to block gamma radiation from escaping the lab.
需要厚厚的鉛牆來阻擋伽瑪輻射，以免其逸出實驗室。
gamma radiation requires lead shielding
Astronomers detected a powerful burst of gamma rays from a distant galaxy.
天文學家從遙遠的星系偵測到一次強烈的伽瑪射線爆發。
Some food factories use gamma rays to kill harmful bacteria without heat.
有些食品工廠使用伽瑪射線來殺死有害細菌，不需加熱。
- gamma ray
the countable, photon-focused form of the same concept — 'gamma rays' are individual rays, while 'gamma radiation' is the overall emission
- gamma radiation
the uncountable form emphasising the continuous emission rather than individual photons
文法句型
gamma rays
gamma radiation
用法筆記
The countable form 'gamma ray' refers to individual photons of this radiation; the uncountable 'gamma radiation' describes the emission as a whole. Distinguished from sense 1 by scientific context — this sense never refers to the letter symbol itself.
常見錯誤
gamma — 形容詞
1. referring to the third member in a series of at least three chemically similar s
伽瑪型
化學物質的第三種型態
referring to the third member in a series of at least three chemically similar substances, following the alpha and beta labels
Dr. Okafor showed the class that the gamma form of insulin has a different shape from the alpha form.
Okafor 博士向全班展示胰島素的伽瑪型與阿爾法型的摺疊方式不同。
gamma form compared to alpha form
For her PhD project, Hana studied how the gamma variant of the enzyme lipase breaks down fat molecules.
為了她的博士研究，Hana 研究了脂肪酶伽瑪變異型分解脂肪分子的方式。
In the biochemistry lab, Yusuf and his team compared the gamma and beta forms of haemoglobin.
在生化實驗室中，Yusuf 和他的團隊比較了血紅素的伽瑪型和貝塔型。
Blood tests measure gamma globulin levels to check immune system health.
血液檢測測量伽瑪球蛋白的數值，以檢查免疫系統的健康狀況。
文法句型
gamma form
gamma variant
gamma type
用法筆記
Only used attributively (before a noun) in scientific writing. The alpha, beta, gamma naming convention is common in biochemistry and materials science. The gamma variant is usually the third discovered or third most stable form.
2. describing the third position along a chain of atoms in an organic molecule, cou
伽瑪位
分子鏈的第三個原子位置
describing the third position along a chain of atoms in an organic molecule, counting from a starting point; used in chemistry to name specific locations on carbon chains
In linoleic acid, the first double bond is located at the gamma carbon of the chain.
在亞油酸中，第一個雙鍵位於分子鏈的伽瑪碳上。
gamma carbon position in molecular chain
Leila attached a hydroxyl group to the gamma carbon of valeric acid in the lab.
Leila 在實驗室中將羥基連接在戊酸的伽瑪碳上。
gamma carbon position on a specific molecule
During the organic chemistry lab, Ravi identified the gamma carbon in butyric acid.
在有機化學實驗課中，Ravi 辨識出丁酸中的伽瑪碳。
Dr. Vesna explained that gamma-aminobutyric acid helps calm nerve signals in the human brain.
Vesna 醫師解釋說，伽瑪氨基丁酸有助於鎮靜人類大腦中的神經訊號。
文法句型
gamma position
gamma carbon
gamma atom
用法筆記
Exclusively used in organic chemistry. The naming follows this pattern: the reference group or atom is the alpha position, the next is beta, and the third is gamma. Distinguish from sense 1: this sense refers to bond distance along a chain, not to a chemical variant.