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- A pyrotechnically pumped Nd glass laser is demonstrated by the use of pyrotechnic flashlamps composed of several chemical materials arranged in a stable plane concave resonator cavity. 通过试验展示了一种烟火泵浦钕玻璃激光器，采用含多种成分的烟火闪光灯作为泵浦光源，谐振腔为稳定的半共焦平凹腔。
- She is pounding out a new rune on the piano. 他正在钢琴上弹奏一支新曲。
- She has keyed the piano up to concert pitch. 她已经把钢琴的音调升到音乐会的音高标准。
- She struck up the first carol on the grand piano. 她在那架大钢琴上演奏起第一支颂歌。
- The violin is not quite in tune with the piano. 这小提琴跟钢琴的调子不太和谐。
- His figure looks very funny in the concave mirror. 他的样子在凹镜里显得非常可笑。
- His fingers swept the keys of the piano. 他的手指在钢琴键盘上轻快地移动。
- An indented or concave surface or area. 凹陷，洼地凹的表面或地区
- Tom is going to buy either a guitar or a piano. 汤母不是要买一把吉他就是要买一架钢琴。
- The piano solo was well rendered. 那支钢琴独奏曲弹得真好。
- Has the piano been delivered from the shop yet? 钢琴已经从店里运来了没有？
- She can play the most difficult piano music by ear. 她能不看乐谱，光凭听觉记忆弹奏最难的钢琴曲。
- She has a piano on loan from her friend. 她正在借用朋友的钢琴。
- My brother thumped on the piano. 我弟弟重重地敲击钢琴。
- fiat- concave resonator 平-凹腔
- The piece is scored for piano and strings. 这是为钢琴、弦乐器谱的曲子。
- A little piano stood against the wall. 一架小钢琴靠墙放着。
- It was quite a feat to move that piano by yourself. 你真有能耐，一个人挪动那架钢琴。
- The coin rolled underneath the piano. 硬币滚到钢琴的下面了。
- I can play the piano after a fashion. 我多少会弹点钢琴。
