| 1. | ρ is the mass density of the material.
为材料的质量密度。 |
| 2. | The essence of gouzenko's story was simple .
古森科材料的基本内容倒也简单。 |
| 3. | The ship 's timbers are sprung .
船上材料的接头部分松了。 |
| 4. | The key material is amply strong .
键材料的强度足够。 |
| 5. | The action of radiation on materials is termed radiolysis .
辐射对材料的作用称作辐射分解。 |
| 6. | It has been difficult to ascertain the correct source of origin .
要查实材料的正确起源很困难。 |
| 7. | A solvent for the material to be deposited is needed in lpe .
在LPE法中，需要有待淀积材料的溶剂。 |
| 8. | Frozen material should not be stored for more than 1 or 2 weeks .
冷冻材料的保存不应超过一或两周。 |
| 9. | The strength of material is usually obtained by laboratory tests .
通常由实验室的试验得到材料的强度。 |
| 10. | The researchers tested more than 20 mattresses of various materials .
研究人员试验了二十多个不同材料的床垫。 |
