Tacinvariant
互[相]切不变式
🗣️ 情景例句
Lacks planning for career, has no purpose or goals.
对自己的事业没有安排，没有目标和理想。
The usher showed us to our seats.
领座员领我们到我们的位子。
Now the other stuents open their eyes, and guess who has the eraser.
现在其余的学生张开眼，然后猜谁手里有橡皮擦。