數字1到100、整十整百這樣的概數需要全拼寫出來，除非指數值單位，或是在敘述一個數值範圍。
「The control group (three males and two females)…」
「Patients were administered 3 mg/kg TNF…」
「There were 5–10 patients in each group」
如果數字以及度量衡或時間單位出現在句首，數字和單位均應完整拼寫。或者改寫句子，不以數字開頭。
16 species of whale have been added to the list of the world`s endangered animals. 【錯誤】
Sixteen species of whale have been added to the list of the world`s endangered animals. 【正確】
如果數字是英文拼寫，其單位也要用拼寫。
15 mL of buffer was added to the solution. 【錯誤】
Fifteen milliliters of buffer was added to the solution. 【正確】
「Thirty-three sections were cut from each block using a cryostat」
「Ten microliters of drug was administered to each patient」
「Drug (10 μl) was administered to each patient」
如果句首的數字超過100，為了表達清晰，最好改寫這句話。
Three hundred and sixty-seven participants took part in the study. 【錯誤】
A total of 367 participants took part in the study. 【正確】
數字和單位之間應有一個空格 (百分號 %除外)
20 mg, 40 mL, 3 days, 15%
敘述量時用「of」，但是敘述濃度時不要用「of」
mice were given 50 mg of 3-NPA
mice were given 50 mg/kg 3-NPA
大於9999的數字使用千分位逗號
11,000 2,353,000