He braced his foot against the wall.
他把脚顶

稳。
He braced his foot against the wall.
他把脚顶

稳。
She looked over her shoulder to be sure of her footing.
她扭头看了看后面以确认自已是否
稳了。
She lost her footing and fell.
她没
稳而跌倒。
声
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