So rather than just being some sunbathing slacker, they're really very industrious fish, that dance this wild dance between the surface and the bottom and through temperature.
所以跟一些喜欢日光浴的懒汉比起来， 它们可辛勤地多，在海水表层和底层之间 在不同温度之间来回地舞蹈着。
After the sunset the temperature drops to 27 degrees. It becomes so hard to move that the ride on even surface seems a summer ride up the mountain.
日暮时分，气温下降了27摄氏度。在湖面行走亦越发艰难，此时在湖面驱行就像是夏日的。
The investigation result shows that the surface temperature of tubes is remarkably reduced due to the static mixed units so that their service life meets the requirement.
结果表明，由于静态混合元件的使用明显降低了炉管表面温度，所以其服役寿命满足要求。
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