您要查找的是不是：
- Hum the opening bars of your favourite tune. 哼一哼你喜爱的曲子的开头几个小节。
- She continued to hum the song over and over. 她一遍又一遍地不断哼唱那支歌。
- He could hear the hum of the bees in the garden. 他听得见花园里蜜蜂的嗡嗡声。
- The only sound he heard was the hum of the machine. 他听到的唯一的声音就是那台机器的嗡嗡声。
- Have you turned off the water valve? 你关掉水阀了吗？
- 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。
- He soon detected the faulty valve. 他很快查到了出毛病的阀门。
- Bees sip honey from flowers and hum their thanks when they leave. 蜜蜂从花中啜蜜，离开时营营地道谢。
- Charles makes things hum around that office. He's an excellent administrator. 查尔斯使那个办公室的气氛很活跃。他是个出色的行政人员。
- valve hummer 电子管蜂音器
- Things are starting to hum with activity. 气氛变得活跃起来。
- All around was a drowsy hum of insects. 到处是一片小虫的催眠似的嗡嗡声。
- The pump sucks air out (of the vessel) through this valve. 这台泵通过这个阀门把(容器中的)空气抽出。
- He can hear the hum of the bee in the garden. 他听得见花园里蜜蜂的嗡嗡声。
- The exhaust valve on my car have burn out three times. 我车子上的排气阀已烧坏三次。
- The air of the ball began to hum. 舞会的气氛开始活跃起来了。
- The exhaust valve on my car has burnt out three times. 我车子上的排气阀已烧坏三次。
- We hear the hum of conversation from the next room. 我们听到隔壁房间嗡嗡的谈话声。
- She heard the hum of voices in the house. 她听见了屋子里的嘈杂声。
- Hummer is the only tool you need. 锤子是你需要的唯一工具。
