Prelaser
a. 激光照射前的\\nn. 激光敏感剂
🗣️ 情景例句
Where di you go to high school?
你在哪儿上高中？
If the hen does not prate,she will not lay.
不叨叨的母鸡不下蛋。
The cave might never have been discovered has not the entrance been spotted by the distinguished French pot-holer, Berger.
若不是法国著名洞穴探险家伯杰由于偶然的机会发现了这个洞口的话，这个洞也许不会为人所知。