Photoactive
a. 光敏的
??? 情景例句
But your L C must reach us 30 days before delivery.
但交貨前30天，我們必須要收到你們的信用證。
Is that girl a student?
那個女孩是學生嗎？
You'd better hurry and buy a ticket then. It'll be very popular.
那你最好趕緊買張票吧！他的音樂會是很受歡迎的。