Biosecurity
生物安全
??? 情景例句
The patient showed a marked improvement.
病人病情顯著好轉(zhuǎn)。
The creditor has always a better memory than the detor.
放債人的記性比借債人好。
Did you give our English teacher a card for Teachers' Day?
你給了我們的英語老師教師節(jié)賀卡了嗎？