Biconcave lens
[医] 双凹透镜
🏥 医学释义
双凸透镜
🧩 词语组成解析
a. 双凹的\\n[医] 双凹[形]的
lens
[lɛnz]
n. 透镜，镜头;眼睛中的水晶体;隐形眼镜;汽车的灯玻璃;
🗣️ 情景例句
If you want my advice, I don't think you should go.
如果你想听我的建议，我认为你不应该去。
To walk away
走开
it requires 97 per cent less energy to travel the quarter of a million miles from the Moon to Earth-orbit than the 200 mile-journey from Earth's surface into orbit!
因此，从月球到地球的25万英里所消耗的能量要比从地球表面进入地球轨道的200英里所耗能量少97%。