Davy's lever
[医] 戴维氏杆(直肠止血杆)
🧩 词语组成解析
lever
['li:və, 'levə]
n. 杠杆;操作杆;工具;
vt. 用杠杆撬动;
🗣️ 情景例句
in almost a full week.
差不多有一整个星期了。
They operated on him last night.
他们昨晚给他动手术了。
Half an hour? That's too long! Is there a bus?
半小时？那太久了！有公共汽车吗？