Magnaglo
电磁紫外线探伤法, 玛格纳络磁性粉末
🗣️ 情景例句
I would prefer a non-smoking room.
我想要一间不许吸烟的房间。
We can't write very well.
我们不能写那么多。
I go to school by bike every day.
我每天骑自行车上学。