| 1. | The moment was ripe for an invasion .
发动一次入侵的时机已经成熟。 |
| 2. | The challenge of invasion had definitely weakened .
入侵的威胁已显然减轻。 |
| 3. | The probability of invasion may seem to have receded for the moment .
入侵的可能性好象暂时已经减少了。 |
| 4. | The respiratory tract is an important portal of entry for respiratory viruses .
呼吸道是呼吸道病毒入侵的重要门户。 |
| 5. | Mucous membranes or breaks in the skin were likely alternative entryways into the body .
粘膜或者皮肤上的破裂处都可能成为病毒入侵的通道。 |
| 6. | One method of preventing seawater intrusion is to reduce offtake to a planned level .
防止海水入侵的一种方法是减少开采量使其达到设计的地下水位标高。 |
| 7. | We will make certain assumptions about the properties of the intruding magma and of the intruded strata .
我们对入侵的岩浆和被侵入地层的性质做某些假定。 |
| 8. | To place and understand these special action units, one needs a brief clear picture of the invasion .
要了解和认识这种特别行动队，必须对这次入侵的全貌有一个简单清楚的了解。 |
| 9. | Pao an was once a frontier stronghold, during the chin and tang dynasties, against the nomadic invaders to the north .
在秦朝和唐朝的时候，保安曾是抵御北游牧民入侵的边防要塞。 |
