| 1. | Lasers can also be used to purify materials .
激光还可以用于材料提纯。 |
| 2. | The tangent may be used to find the direction .
这方向也可用正切求得。 |
| 3. | A safety strap is used to prevent falling .
要系上安全带防止跌下。 |
| 4. | This will be used to multiply each term .
它被依次用来乘每一项。 |
| 5. | Computer methods may then be used to advantage .
采用计算机方法是有益的。 |
| 6. | The-ase ending is used to designate enzymes .
词尾--ase表示酶。 |
| 7. | Burger was a devil they were used to .
布格尔是他们已经习惯了的一个恶魔。 |
| 8. | Sometimes an oar is used to steer a boat .
有时桨用以操纵小舟。 |
| 9. | Double-headed arrows are used to indicate resonance .
双箭头用来表示共振。 |
| 10. | He showed that the heat could be used to boil water .
他指出，热能使水沸腾。 |
