stepping stone

翻译：好习惯是成功的垫脚石。

A good habit is a stepping stone to success.

参考翻译：Good habits are a stepping stone to success. 或 Good habits are stepping stones to success.

造句一：微信朋友圈的简洁方便功能让微商这个群体迅猛发展起来。

The fuction is simple and convenient of WeChat Moments is a stepping stone to the WeChat salemans.

A 是 B 的敲门砖   

A is a stepping stone to B