Acsin
反正弦函数
🗣️ 情景例句
Good morning. This is Huang Feng.
早上好，我叫黄凤。
Do you often do composition after school?
你常常在放学后做作文吗？
Please give us a short talk. Nothing difficult!
请你给我们作一次简短的讲话。这对你并不困难！