Translational symmetry
[化] 平移对称
🧩 词语组成解析
[机] 平移的
🗣️ 情景例句
They have an opening.
他们有一个空房间。
He spends a lot of time reading books on ecology.
他花了大量的时间阅读生态学方面的书籍。
It was beginning to get dark. I think we'd best stay the night here, I said.
天开始变黑。“我看我们最好在这里过夜，”我说，