Commutative law
[計] 交換律
?? 詞語組成解析
a. 交替的, 交換的\\n[法] 交換的, 代替的, 互相的
law
[l?:]
n. 法;法學;規律;法制;
vt.& vi. [口語、方言]訴諸法律，對…起訴，控告;
vt. 控告;對…起訴;
??? 情景例句
This dictionary is more useful than I expected.
這字典比我所預期的更有用。
I often have supper at night.
我常常在晚上吃晚餐。
It's my birthday, and I'm going to have a party. Didn't you know?
我的生日聚會，我計劃舉辦一個聚會。你不知道嗎？