Sph
abbr. spherical lens 球面透镜
🗣️ 情景例句
And take measures to reinforce them. Please set your mind at rest.
并采取措施加固。请放心好了。
How long does it take?
火车要开多久？
He usually stays at home with his pet dog.
他通常跟他的爱犬待在家里。