ru
ru — 名詞
1. a medicine used to end a pregnancy during its early stage
墮胎藥
用來終止早期懷孕的藥
a medicine used to end a pregnancy during its early stage
The clinic gave Talia ru after confirming the pregnancy was still early.
診所確認仍是早期懷孕後，就給了 Talia 墮胎藥 ru。
give ru to + person in a clinic
Beatriz asked whether ru could be taken safely at home.
Beatriz 詢問 ru 是否可以在家中安全服用。
take ru in a patient question
The doctor explained that ru works best in the first weeks.
醫師解釋 ru 在懷孕最初幾週效果最好。
After the scan, Jin received ru with clear written instructions.
做完超音波後，Jin 領到了 ru 和清楚的書面說明。
A leaflet said ru should only be used under medical care.
簡介單上寫著 ru 只能在醫療照護下使用。
- mifepristone
the full medical name of the drug
- abortion pill
a broader everyday label that may refer to more than one medicine in the treatment
文法句型
take ru
give ru to + person
dose of ru
用法筆記
Usually seen in medical discussions as a short form of RU-486 or mifepristone, not in everyday conversation. This sense refers to ending an existing early pregnancy, not preventing pregnancy after sex.
常見錯誤
ru — 符號
1. the symbol for ruthenium, a hard metallic element shown in chemical formulas and
釕
化學元素釕的符號
the symbol for ruthenium, a hard metallic element shown in chemical formulas and on the periodic table
James circled Ru on the periodic table before the chemistry quiz.
James 在化學小考前圈出了元素週期表上的釕（Ru）。
Ru on the periodic table
The lab label said the sample contained Ru and iron.
實驗室標籤寫著那個樣本含有釕（Ru）和鐵。
Ru in a materials label
Shanti measured 2 g of Ru for the classroom experiment.
Shanti 為了課堂實驗量了 2 克的釕（Ru）。
A science poster compared Ru with Rh and Pd.
科學海報拿 Ru 跟 Rh 和 Pd 做比較。
The teacher wrote Ru beside element 44 on the board.
老師在黑板上把 Ru 寫在第 44 號元素旁邊。
- ruthenium
the full element name, used in normal speech and writing
文法句型
Ru on the periodic table
[number] g of Ru
Ru + another symbol
用法筆記
Write it with a capital R and a lower-case u. In speech, people usually say the full word 'ruthenium' instead of reading the two letters aloud.
常見錯誤
2. a specialist unit based on how a substance acts in tests on rats
鼠單位
以大鼠試驗算出的單位
a specialist unit based on how a substance acts in tests on rats
The old report measured the hormone activity in ru.
那份舊報告用鼠單位 ru 來測量荷爾蒙活性。
measured in ru
Putri copied 12 ru from the lab chart into her notes.
Putri 把實驗圖表上的 12 ru 抄進筆記裡。
number + ru in a lab record
The bottle label listed 5 ru of enzyme activity.
瓶身標籤列出 5 ru 的酵素活性。
Kian found ru in an older medical paper from the 1960s.
Kian 在一篇 1960 年代的舊醫學論文裡看到了 ru。
A footnote explained that ru was a unit from rat tests.
註腳解釋 ru 是一種來自大鼠試驗的單位。
- rat unit
the full written form of the unit
文法句型
[number] ru
measured in ru
ru of + substance activity
用法筆記
This sense belongs to specialist scientific writing and is not used in everyday speech. It is written in lower-case and refers to a measurement unit, not to the chemical symbol Ru for ruthenium.