1. Pakistan derives about a fifth of its output from agriculture, and much of its most productive cropland is submerged or turned to the bog. 巴基斯坦五分之一的产出来自于农业，但其高产量农田中已有许多被淹没或变成了沼泽。
2. The question about the rate of evolution must now be turned around: does evolution ever proceed gradually, or does it always occur in short bursts? 关于进化速度的问题现在必须解决：进化是逐步进行的，还是总在短时间内发生？
3. She had wandered about long enough to feel too tired to wander any farther, and she turned back. 她徘徊了很长时间，累得再也走不动了，于是她转身往回走。
4. Only about half a dozen people turned up. 只有六七个人到场。
5. I felt wretched about the way things had turned out. 事情落了这么个结局，我感到很难受。
