Concave lens
[化] 凹透镜\\n[医] 凹透镜, 近视镜片
🧩 词语组成解析
concave
['kɔn'keiv]
n. 凹面，成凹形;
adj. 凹的;
vt. 使成凹形;
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
The scary part's leaving home and moving to college.
害怕的是要离开家搬到学校去。
In secondary school, children study history and geography.
中学的小孩会读历史和地理。
There are even stories of half-trained elephant calves who have refused to feed and pined to death when by some unavoidable circumstance they have been deprived of their own trainer.
训练了一半的小象，由于不可避免的情况与他们的主人分离后，竟拒绝吃食，消瘦至死。