1.consider doing考虑做某事 consider what to do /how to do sth.考虑做什么、如何做某事
2.make sure确定 make sure to do sth.一定要做某事 make sure of sth.对......确信 make sure that+从句 确保，弄清楚
3.keep...away from使...远离
4.best of all更好的是，更重要的是
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