二足动物开始直立行走。
She stood up straight and still!
而她却笔直站了起来！
The supervisor stood up straight and stiff and told his story like a lesson;
行政长官笔直僵硬地站着，好像上课似地讲着他经历的事情经过。
He finished his conversation and stood up, looking straight at me.
他结束了谈话站起来，直视着我。
The man, arms folded over his chest, stood straight up like a statue of bronze.
那个人双手抱胸，像一座青铜雕塑直立在那里。
The man, arms folded over his chest, stood straight up like a statue of bronze.
那个人双手抱胸，像一座青铜雕塑直立在那里。
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