Spatial symmetry
[化] 空间对称性
🧩 词语组成解析
🗣️ 情景例句
I feel sick as a dog.
我病得很厉害。
It is easy to open a shop but hard to keep it always open.
开设店铺易，维持常开难。
To do this, he must be at least as knowledgeable as the dealer.
要做到这一点，他至少要像古董商一样懂行。