1.pitfall 困难，陷阱

The road to the conquest of cancer is long and full of pitfall.

战胜癌症的征途是漫长的，而且布满足想不到的困难roAcEdu9J%;7。

2.fulfill promise 履行承诺

In this century, our world has the opportunity to fulfill the great human promise that all lives have equal value.

在这个世纪，我们有机会实现人类的一个伟大承诺——人人生而平等]hF[,mN2;nSv7Tyn。

3.be on track 走上正轨（形容事情发展良好）

Executives pledged to get the company back on track. Since then, though, shares have fallen 30 per cent.

主管们发誓要让公司重上轨道，不过从那以后股票价格还是下降了30％PPa7!PkcY#|V)LN77E6。

4.turn out 结果是

No one could have foreseen things would turn out this way.

没人能预料到事情会变成这样98pvZUCz0~lYw。