| 例句 |
They contrived a mask against poison gas.他们设计了一种防毒面具。There are reports that poison gas is being used against the rebels.有报道称正在使用毒气对付叛乱者。The report contained details of the poison gas and cited examples of accidents involving it.报告中描写了这种毒气的有关细节，还引证了涉及这种毒气的一些事故。The use of poison gas was outlawed.毒气被禁用。 |