as

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[z；z]〈介词〉〈副词〉像…一样；作为；当做；照…方式；当…时；随著

He is as tall as his brother．他和他哥哥一样高。

Don’t treat him as a child．不要把他当小孩子对待。

We did as he told us．我们照他说的去做了。

We must walk faster as it is getting dark．天快黑了，我们必须走快一点。