| 1. | You are up for a command, i know that . 你已经获得提名,这我已知道。 |
| 2. | Today only a few of the answers are known . 目前已知的答案只有少数几个。 |
| 3. | Several chemicals are well known teratogens . 有一些化合物已知是致畸物质。 |
| 4. | Your theory does not square with the known facts .. 你的说法跟已知的事实不符。 |
| 5. | Humic substances are known to coat membrane filters . 腐殖质是已知能够覆盖滤膜的物质。 |
| 6. | The pattern of the finite-difference coefficients is known . 有限差分系数的图式是已知的。 |
| 7. | It is known to be harmless . 已知它是无害的。 |
| 8. | and sulfates are known to corrode metals. 已知硫酸和硫酸盐能腐蚀金属。 |
| 9. | A hydrocarbon was known to be either an alkene or alkane . 某碳氢化合物已知可能是烯烃或是烷烃。 |
| 10. | Two cases can be made smaller than any datum in the given . 两件事的已知条件的差别能变得任意小。 |