... quiet sun noise ==> 宁静太阳噪声 quiet take-off and landing ==> 无声起飞与着陆 quiet thermal emission ==> 宁静热发射 ...
权威例句
1.
The engines would have variable nozzles, which would be fully opened on take-off andlanding, so that the exhaust would be slow and relatively quiet, and narrowed when the aircraft was cruising, providing the necessary speed.