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| 71. | be used which will concentrate the waste solution to the extent that it can be reintroduced to the process |
| 可以用任何方法来浓缩废液，使其能够再送回生产过程的化学品贮糟中。 |
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| 72. | Coal was formed out of dead forests by a long process of chemical change. |
| 煤是由死去森林经过长期而缓慢的化学变化形成的。 |
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| 73. | It is a special chemical manufacturing process in which atoms and molecules are orderly built to form |
| 纳米技术是在纳米(1nm=10a)尺度上的化学工程。这种特殊的化学加工工艺，将原子和分子有序地排列形成物质的一种新状态--纳米相。 |
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| 74. | Coal was formed out of dead forests by a long slow process of chemical change. |
| 煤是由埋在地底的森林经过长期而缓慢的化学变化过程而形成的。 |
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| 75. | The process of chemical and physical change in deposited sediment during its conversion to rock. |
| 成岩作用在岩石转化过程中沉积物发生化学和物理变化的过程 |
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| 76. | For example, it is challenging for the chemical etching process to drop below a1.5 aspect ratio while |
| 比如，表观比率低于1.5对于化学腐蚀试一大挑战，而激光切割和电铸可制成表观比率为1.1的钢网。 |
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| 77. | (used of rubber, e.g.) treated by a chemical or physical process to improve its properties (hardness |
| （用来指橡胶等）经过物理或者化学处理以改善其性能（硬度、强度、气味和弹性）。 |
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| 78. | In this process a chemical reaction occurs that depletes the metal plates and chemicals in the solution |
| 在这个过程中发生了某种化学反应，这反应消耗了金属板和溶液中的化学药品。 |
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| 79. | Etch- A process of chemical reactions or physical removal to rid the wafer of excess materials. |
| 蚀刻-通过化学反应或物理方法去除晶圆片的多余物质。 |
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| 80. | (mineral extraction) a surface-active chemical used in flotation process to increase the attraction to |
| （矿物提取）一种表面活性化学物质，用于浮选过程以增加对某种矿物的捕收力。 |
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