Photochromics
光色材料; 光色体
🗣️ 情景例句
Sometimes it sounds a little stubbon.
有时候，这显得有点固执。
I asked him to pay, but he wouldn't.
我请他付账，但是他不肯。
The dream he had had for so many years ended there.
他多年来的幻想从此破灭。