1.second hand （资料等）第二手的，间接的；用过的，旧的

例句：So how can cigarette smokers, or people exposed to secondhand smoke, lower the risk of lung cancer?

因此如何使那些吸烟者，或是细二手烟的人们降低患肺癌的危险呢？

2.second nature 第二天性，习性

例句：New systems take time before they become second nature, so work hard at sticking to it and developing those new habits.

在新的方法变成第二天性之前，会花一段时间，所以要努力坚持它，将其发展为新的习惯。

3.second sight 超人的视力，预见力，洞察力

例句：Jane's mother has second sight and correctly predictedthe date on which Jane met the man she eventually married.

简的母亲有先见之明，她能正确地预见简哪一天会碰上她的未婚夫。

4.second thoughts 重新考虑,进一步的考虑

例句：This murderous lunatic could kill them both without asecond thought.

这个杀人狂会毫不犹豫地把他们两人都杀掉。

5.second to none 不比任何人差，首屈一指

例句：In the output of grain, China is second to none.

在粮食产量上， 中国首屈一指。

6.secondary school 中学

例句：He is trying to set up a new secondary school in Actonbecause he is not satisfied with the choice facing his four children under six.

他也正努力在阿克顿建立一所新的中等学校。 他对他那四个不到六岁的孩子将要面临的选择而不满。