您要查找的是不是：
- astern guarding valve 倒车隔离阀
- One of the fishing boats sank down astern of us. 有一艘渔船在我们后面沉没了。
- The dog kept a vigilant guard over the house. 这只狗警惕地守护着这所房屋。
- He urged them to guard against conceit. 他要求他们防止骄傲自满。
- He bribed his way past the guard and escaped. 他买通看守而逃之夭夭了。
- I was off my guard and made no suitable reply. 我没提防，因此没有作出适当的回答。
- The guard of honor headed up the whole parade. 仪仗队走在游行队伍的最前头。
- Have you turned off the water valve? 你关掉水阀了吗？
- Please guard against pickpockets on the bus. 在公共汽车上要谨防扒手。
- The soldier volunteered for guard duty. 那个战士自告奋勇去站岗。
- The guard had orders to shoot on sight. 哨兵奉命见人就开枪。
- We need an eye bolt to fit this valve. 我们需要一个有眼螺栓来固定这个阀门。
- Be on your guard, I conjure you. 千万要警惕呀，我恳求你。
- Four soldiers stood guard over the coffin. 四个士兵守卫灵柩。
- The guard should be watchful during the night. 警卫在黑夜里也应该警醒。
- The hire purchase company repossessed my car because I fell astern with the payments. 这家分期付款购买公司取回了我的汽车，因为我没能及时付款。
- The guard was killed with a high-powered rifle. 那卫兵被杀伤力大的火枪击毙了。
- A ship falls astern by the force of a current. 船会受水流的力量而后退。
- The train robbers coshed the guard. 抢劫列车的匪徒用短棍袭击列车长。
- He soon detected the faulty valve. 他很快查到了出毛病的阀门。
