您要查找的是不是：
- Structures built on strong rock generally need no foundation since rock is usually as strong as concrete, and goes much deeper. 修筑在坚固岩石上的结构一般不需要基础，因为岩石通常和混凝土一样坚固，而且岩层更深。
- The second time occurred in the end of E 2 (end of Eocene), a period during which the main source rock generated hydrocarbon in its maximum amount. 第二次发生在 E2 末 T03 构造层形成之前 ;即始新世末 ;此时区内主要烃源岩都已经进入生烃高峰 ;是区内主要的油气生成、运移期 .
- Biotite is a subordinate constituent of the mafic and ultramafic rocks generally. 黑云母一般是镁铁质及超镁铁质岩石中的次要成分。
- The rock was honeycombed with passages. 岩石上有许多蜂窝状的小孔。
- Many young rock hounds grow up to be geologists. 许许多多爱好收集岩石的少年，长大后成了地质学家。
- None of us had ever set eyes on a generator before. 我们过去谁也没看见过发电机。
- The climber had to negotiate a steep rock face. 那攀登者得攀越一陡峭岩石。
- This layer of rock contains a lot of flint. 这一岩层中有大量燧石。
- The generator shuts off automatically. 这台发动机能自动停止运转。
- The water had worn a channel in the rock. 水把岩石冲出了一条沟。
- He dash the glass bowl to bit on a rock. 他对著石块把玻璃碗砸得粉碎。
- The mountain rise up in a steep wall of rock. 这座山高而陡，形成一道岩石屏障。
- The mountain rose up in a steep wall of rock. 这座山高而陡，形成一道岩石屏障。
- He chiseled that rock into the figure of a woman. 他把那块石头凿成一个女人像。
- The boat was sundered by the rock. 船被岩石撞碎了。
- Deep grooves channelled the soft rock. 在软岩石上形成许多深槽。
- The mason was chipping away at the rock with a hammer. 石匠用锤子一点一点地把那块石头击碎。
- She is crazy about rock and roll. 她喜欢摇滚乐。
- The road was blocked by a huge rock. 道路被一块大石头堵住了。
- We have an auxiliary generator in case of power cuts. 我们有一台万一断电时使用的备用发电机。
