Iecnum
铜镍合金
🗣️ 情景例句
Summer is my favorite season; I love the heat.
夏季是我最喜欢的季节，我喜欢热。
Do you speak English?
你会说英语吗？
but the paper was wrapped round a drum which rotated slowly.
根但是纸是卷在慢慢旋转的圆筒上的。