凹的 n凹(面)英释中释adja concave surface is curved inwards in the middle
1 concave mirror,n. 凹透镜
2 concave surface,凹面,内弧面
3 concave grating,凹面光栅
4 concave lens,凹透镜;近视镜片
5 concave bank,凹河岸;冲刷河岸
1 a concave lens.凹透镜
更新时间:2025-04-04 04:06:14