| 1. | It is useful to think classically .
根据经典的观点来思考问题是有用的。 |
| 2. | His article contains much that is useful .
他的文章里有很多有用的东西。 |
| 3. | It is useful to have a convenient supermarket .
附近有家超级市场实在方便。 |
| 4. | Dextrose solutions are useful for providing water .
葡萄糖液可用来供给水分。 |
| 5. | I am glad you think i have been useful to her .
你认为我帮了她的大忙，我很高兴。 |
| 6. | Tryptophane also appears to be useful in easing pain .
色氨酸似乎还具有镇痛的作用。 |
| 7. | Every part of the pig is useful .
猪浑身上下都是宝。 |
| 8. | A standing opaque beacon may be useful in addition .
此外，也可以使用常设的实体觇标。 |
| 9. | She found many different ways of being useful to him .
她在许多别的事情上为他效过劳。 |
| 10. | Each is useful in its degree .
各有不同程度的用处。 |
