What do you mean by doing STH.?
你做某事是什么意思？
youdao
By doing STH, we become more and more sturdy and powerful.
通过做某事，我们变得越来越坚强和有力量。
When I passed by his door, I heard him doing STH.
当我经过他的房门时，我听到他正在做某事。
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