Orientability
可定向性
🗣️ 情景例句
It was on his birthday, June second, two years ago.
是在他生日那天。两年前的六月二日。
That's a book.
那是一本书。
For lunch I had noodles, salad and later a peach.
午餐我吃了面条、色拉，后来还吃了只桃子。