To establish a secure link while remaining 100 metres underwater, submarines could transmit photons of laser light to satellites, for retransmission to base.
当潜艇地100米海底时，要建立安全的通信链路，把光子激光发射到卫星上去，再由卫星转发回基地。
The toughness of HAZ is higher than base metal under appropriate laser welding conditions.
在合适的激光焊接条件下，热影响区韧性高于母材；
The discovery of pyroelectric effect is a base for laser and infrared detector.
热释电效应的发现，为激光和红外探测的应用奠定了良好的基础。
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