th
th — 縮寫
1. the written abbreviation for Thursday — the day of the week between Wednesday an
星期四
星期四的英文縮寫
the written abbreviation for Thursday — the day of the week between Wednesday and Friday. Used in calendars, schedules, and informal notes.
The shop is closed every th (Thursday) for cleaning and restocking.
這家商店每週四公休進行清潔及補貨。
every th (Thursday) — regular weekly schedule
Please hand in your essay by th (Thursday) at 5 pm.
請在週四下午五點前繳交作業。
by th at [time] — deadline format
City Health Clinic is open Mon–th from 9 am to 6 pm for walk-in appointments.
辦公時間為週一至週四，上午九點到下午六點。
A notice on the door said the team meeting is next th at 10:30.
門上的通知寫著團隊會議在下週四上午十點半。
文法句型
day ranges: Mon–th / Tues–th
用法筆記
Common in schedules, calendars, and business writing. The full spelling 'Thursday' is preferred in formal letters and official documents.
常見錯誤
2. the chemical symbol (written as 'Th') for thorium — a silver-white radioactive m
釷
放射性金屬元素釷的符號
the chemical symbol (written as 'Th') for thorium — a silver-white radioactive metal found naturally in rocks and soil. In scientific formulas and the periodic table, the symbol is always written with a capital T (Th), while informal notes sometimes use lower case (th).
A student pointed to the periodic table on the laboratory wall and read Th as the symbol for thorium.
元素週期表上以 Th 作為釷的符號。
Th as the symbol for [element]
A chemist wrote the equation using the symbol Th for the thorium atom.
化學家在方程式中用符號 Th 來代表釷原子。
Scientists are studying Th as a potential fuel for a new type of nuclear reactor.
科學家正在研究將 Th 作為新型核反應爐的潛在燃料。
Nellie learned in her geology class that thorium (Th) is more common in the Earth's crust than uranium.
釷（Th）在地殼中的含量比鈾更豐富。
文法句型
Th + verb (in scientific writing)
the symbol Th
用法筆記
In scientific writing the chemical symbol is always capitalised as 'Th'. In less formal contexts the lower-case form 'th' is sometimes used as an abbreviation for the element name.
常見錯誤
th — 名詞
1. the written medical abbreviation for 'thyroid hormone' — the substance produced
甲狀腺素
甲狀腺荷爾蒙的英文縮寫
the written medical abbreviation for 'thyroid hormone' — the substance produced inside the thyroid gland that tells the body how fast to use energy. In blood-test reports, a 'th test' measures the amount of this hormone in a patient's blood.
Dr. Chen's lab results showed the patient's th levels were below the normal range, suggesting an underactive thyroid.
檢驗結果顯示病人的甲狀腺素數值低於正常範圍。
th + noun: th levels
A nurse showed the worried patient where th appeared on the lab form and explained it stands for thyroid hormone.
護理師解釋說，th 代表甲狀腺荷爾蒙，負責控制身體的新陳代謝。
th stands for [full form]
Dr. Patel ordered a th blood test after the patient complained of constant tiredness and weight gain.
醫生測量血液中的甲狀腺素，以判斷甲狀腺是否正常運作。
Six weeks of daily medication brought the patient's th levels back to the normal range.
藥物幫助在六週內將病人的甲狀腺素恢復到正常範圍。
文法句型
th + noun (e.g., th levels, th test)
用法筆記
Used only in written medical records, lab reports, and clinical notes. In speaking, doctors usually say 'thyroid hormone' rather than 'th'.