| 1. | Opacity is due to crazes in the resin .
不透明是因树脂中产生裂纹。 |
| 2. | Positive line work and letterpress must be opaque .
阳像线划原图和注记必须是不透明的。 |
| 3. | The method applies to both opaque and transparent objects .
这个方法既适用于不透明物体，又适用于透明物体。 |
| 4. | The expansion of the envelope will gradually thin out the obscuring dust .
包壳的膨胀会使不透明的尘埃逐渐变得稀薄。 |
| 5. | In advanced stages the opaque corneas may ulcerate and even perforate .
在疾病后期，不透明的角膜可能产生溃疡，甚至穿孔。 |
| 6. | The moving current is white and opaque due to the use of a bentonite solution .
由于采用膨润土溶液，流动的异重流为白色不透明的。 |
| 7. | During these tests she was able to read a newspaper through an opaque screen .
在这些测试中，她能够隔着一块不透明的挡板阅读报纸。 |
| 8. | A circular opening in an opaque screen transmits only a small circular patch of a wave surface .
不透明屏上一个圆孔仅仅透射波面的一小圆块。 |
| 9. | Carbon black is an opacifier which prevents radiant energy transmission to the interior of the propellant .
炭黑是不透明的，可以防止辐射热传到推进剂内部。 |
| 10. | And some minutely crystalline varieties, such as flint, may be opaque and of a waxy luster .
某些细小的结晶变种，如燧石，可能是不透明的，并具有腊样的光泽。 |
