sec.造句

例句与造句

1. an irradiation of 60 sec. limits the build-up of excessive gamma radiation levels .
   采取60秒辐射限定了剩余伽玛射线水平的增高。
2. at low frequencies, such as 10 per sec., pulsation is sensed rather than vibration .
   在低频率（譬如每秒十次）时，所感觉到的是脉冲而非振动。
3. there is an onset of high frequency motion which is common to both components about 1. 8 sec. after the beginning of the record .
   大约在记录开始18秒后，两种分量都有高频运动出现。
4. It's difficult to find sec. in a sentence. 用sec.造句挺难的