Backstroke
[ ['b?kstr?uk] ]
輔助 Assistant
n. 還擊, 反手擊球, 仰泳\\nvi. 還擊, 反手擊球, 仰泳\\nvt. 用反手擊
?? 牛津釋義
backstroke
n [U] swimming stroke done on one′s bac;s back in the water 仰泳.
??? 情景例句
for reading to the kids in the hospital.
為住院的孩子朗讀。
My fever is gone.
我的燒已經退了。
Imagine a pen attached to the weight in such a way that its point rests upon a piece of paper on the floor.
假定把一支筆拴在重物上，筆尖落在地板上的一張紙上，