1.give off 發出

例句：Osmanthus blossoms give off [exhale] a rich perfume.

桂花發出濃郁的芳香。

2.surgical biopsy 外科活檢

例句：Final diagnosis was based on either surgical biopsy or disease progression on extended follow-up or death.

最終的診斷結論是依據外科活檢、長期隨訪期間的疾病進展情況或死亡來決定。

3.volatile chemical 揮發性化學物

例句：Fifth, the ink, daily cleaning the volatile chemical potions, which leads to health workers and environmental pollution.

第五，日常性的墨水清洗所采用的揮發性化學藥水，造成對工人健康及環境的污染。

4.back off 后退

例句：The crowd backed off in terror as the police charged.

警察沖上來時，人群因害怕而后退。