| 1. | The little restaurant is known to all locally . 这家小餐馆在当地远近闻名。 |
| 2. | Humic substances are known to coat membrane filters . 腐殖质是已知能够覆盖滤膜的物质。 |
| 3. | Both types are known to be productive of oil and gas . 这两类圈闭是盛产石油和天然气的。 |
| 4. | It is known to be harmless . 已知它是无害的。 |
| 5. | and sulfates are known to corrode metals. 已知硫酸和硫酸盐能腐蚀金属。 |
| 6. | It's been known to no one except my immediate family . 这件事除了我的直系亲属外,谁也不知道。 |
| 7. | Hamlet and laertes were known to excel at this sword play . 哈姆莱特和雷欧提斯两个人都精通剑术。 |
| 8. | The pig is the only animal in which hog cholera is known to occur naturally . 猪是已知自然发生猪瘟的唯一动物。 |
| 9. | They had decided that they didn't want my whereabouts to be known to the world . 他们已经决定不让我的行踪公诸于世。 |
| 10. | Smokestacks are known to sway in the wind if they are not rigid enough . 如果烟囱没有足够的刚度;它就会在风中摇摆。 |