您要查找的是不是：
- 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。
- English is not the usual medium of instruction in our school. 英语不是我校通常使用的教学语言。
- 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。
- 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。
- An ASCII control character, end of medium. 一种ASCII码控制字符，媒体结束符。
- This cloth is of medium quality. 这种布质量平平。
- The guard had orders to shoot on sight. 哨兵奉命见人就开枪。
- 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。
- He prefers a happy medium in life. 他在生活中甘居中游。
- The guard should be watchful during the night. 警卫在黑夜里也应该警醒。
- The guard was killed with a high-powered rifle. 那卫兵被杀伤力大的火枪击毙了。
- The train robbers coshed the guard. 抢劫列车的匪徒用短棍袭击列车长。
- A fish in water is in its natural medium. 鱼在水里就是在自然环境中。
- Water is the natural medium in which fish live. 水是鱼类赖以生存的自然环境。
- There is a medium in all things. 凡事都有中庸之道。
