| 1. | All sorts of difficulties cropped up . 各种各样的困难意想不到地出现了。 |
| 2. | The subject cropped up as we talked . 我们交谈时无意中涉及到了这个问题。 |
| 3. | All sorts of unexpected difficulties cropped up . 种种想像不到的困难都发生了。 |
| 4. | New difficulties cropped up . 发生新的困难。 |
| 5. | Keep calm when problems crop up . 遇事冷静。 |
| 6. | I shouldn't be surprised if he cropped up this evening . 如果他今晚突然出现,我并不感到惊讶。 |
| 7. | Proper measures were taken as soon as erroneous ideas cropped up . 错误思想一冒头,就及时采取了措施。 |
| 8. | A different example where accuracy is lost will crop up unexpectedly . 损失精度的另一个例子会意外地出现。 |
| 9. | We can 't get unwary just because nothing unusual has cropped up . 不能因为没发生什么问题就麻痹大意起来。 |
| 10. | Watch out for harmful tendencies and deal with them the moment they crop up . 不良倾向一冒尖儿就不要放过它。 |