xhelp oneself 自用，自取
keep an eye on 留意，照看
keep in mind 记住
keep one's head 保持镇静
keep one's word 守信用
keep pace (with)（与……）齐步前进
lead the way 引路，带路
learn by heart 记住，背诵
leave alone 不打扰，不干预
put to use 使用
see to it that 注意，务必，保证
see that 注意，务必，保证
set fire to 使燃烧，点燃
take … for 把……认为是
take a chance 冒险，投机
take (a) delight in 以……为乐
take advantage of 利用，趁……之机
take care 当心，注意
take care of 照顾，照料