so as to do sth 只可放句末 ; 为了 ; 为了做某事
as if to do sth 好像要做
as to do sth
至于做……
以上为机器翻译结果，长、整句建议使用 人工翻译 。
As a result of too exert oneself to do sth. on tiptoe, can make knee concerns because of tiptoe emphatic and too go up at leg abdomen forcibly, bring about turnip leg very easily.
由于过于在脚尖上用力，会使膝盖因为脚尖用力的关系而太用力于腿肚上，很轻易导致萝卜腿。
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