| 1. | It is certain that he was there .
他当时在那里，这是确实的。 |
| 2. | It is certain that we shall succeed .
我们是一定会成功的。 |
| 3. | But it is certain that its awful indistinctness seemed to produce very little impression on the young sinners .
不过有一点是肯定的，由于它的含意太模糊，好象对那几个小玩童丝毫不起作用似的。 |
| 4. | if continues to increase at an accelerating rate, it is certain that ecological effects must occur at some time.
如果二氧化碳继续加快速度增加，肯定在某些时候，生态学效应一定会发生。 |
| 5. | It is certain that he will be back by 3 this afternoon
他当然会在下午3点前回来。 |
| 6. | It is certain that she will do well in her exam
毫无疑问她考试成绩会很好。 |
| 7. | It is certain that he is honest and modest
很显然，他是诚实而谦虚的。 |
| 8. | It is certain that two and two make four
二加二等于四是确信无疑的。 |
| 9. | It is certain that we can get to know some friends in common
当然还可以结识志同道合的朋友。 |
| 10. | It is certain that he took the tv set from the house
毫无疑问，是他从屋子里拿走了那台电视机。 |
