Volunteers listen for frogs identify the species and give population estimates .
志愿者们倾听蛙鸣，鉴定其品种，并作出数量估算。
Dr. schwartz : well we train our doctors to listen for these cues and then to explore them with the patient .
schwartz医生：嗯，是的，我们训练医生们聆听患者生活的细节，然后和他们交流。
Finally dump 5 gallons of clean water into the sump and listen for the pump to start up .
最后，向水槽内倾倒5加仑清水，仔细听听水泵的启动情况。
Chandra 's devices can also listen for nearby transmissions from wireless microphones which use the same bands .
钱德拉的设备也可以监听邻近来自于无线麦克风的传输，这些传输也是使用同一频段的。
We must learn to listen for it is impossible to hear without listening .
我们必须要学会如何去听，如果我们不去认真听，又怎么可能听的见呢。
I told you to leave it alone.why can 't you listen for once ?
我告诉你别管这事你为什么就不能听一次呢?
I saw enough.why don 't you listen for a change ?
我看够了你为什么不能听我说改变一下呢？
Listen for that faint clicking next time you are on the phone with people for more than 20 minutes especially if you are german .
不信的话，下次你可以在电话中连续听这种低沉单调的声音20分钟以上试试，特别是德国人。
Weigh dialogue to decide the nature of the relationship . Listen for clues that indicate that the people are friends casual acquaintances business associates or meeting for the first time .
