Bortam
[冶]硅硼钛铝锰合金
🗣️ 情景例句
I'm lucky to have you all.
我真的觉得拥有你们很幸运。
I have to go now.
我必须走了
Man-made satellites have been sent up into space by many countries.
许多国家都成功地把人造卫星送入了太空。