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- As with autoclaves, lyophilizers should have drains with atmospheric breaks to prevent back siphonage. 与蒸汽灭菌柜一样，冻干机的下水应有液封，防止大气回流。
- All cross-connections subject to backpressure or back siphonage where there is a high potential health contamination. Continuous pressure. 所有存在有害健康的污染可能性高,并且可能出现反压力或反虹吸的交叉连接的地方。持续压力。
- All cross-connections subject to backpressure or back siphonage where there is a low potential health contamination. Continuous pressure. 所有存在有害健康的污染可能性低,并且可能出现反压力或反虹吸的交叉连接的地方。持续压力。
- Back Siphonage Backflow Vacuum Breakers 背部虹吸回流真空破碎机
- Rose bushes shoot again after being cut back. 玫瑰丛修剪後还能再长出新枝。
- He trudge three hour in the snow to get back home. 他在雪中跋涉三个钟点才回到家。
- The crowd fell back to let the players through. 人群后退让运动员们通过。
- Do exercise every day and you'll be back in condition. 每天锻炼锻炼，你很快会恢复健康的。
- The ship beat back against a monsoon. 船逆着季风艰难地行驶。
- I flap the flies away but soon they fly back. 我把苍蝇赶走，但一会儿又飞回来了。
- I never lend books; you never get them back. 我的书决不外借，因为总是有去无回。
- She leaned her head back and whispered the news. 她向后仰着头，小声说出了这个消息。
- The talks have been put back to Friday morning. 谈判推迟到星期五早上进行。
- He hated to tuck his tail and back down now. 他讨厌此时夹着尾巴退回来。
- After a long coma the sick man slowly came back. 昏睡了好久以后，那个病人慢慢地恢复了活力。
- Back in Nigeria we used to play a lot of tennis. 我们以前在尼日利亚经常打网球。
- The crowd fell back to let the ambulance through. 人群往后退，让救护车通过。
- The teacher get a raspberry as she turn her back. 该教师转过身去时有人用舌与唇发出嘲笑她的声音。
- He is a full back of our football team. 他是我们足球队中的后卫。
- How much did your new bicycle set you back? 你的新自行车花掉了你多少钱？
