Rarefaction
n. 稀薄化, 稀薄\\n[医] 稀疏[状态], 疏松[状态]
✅ 同义词
🗣️ 情景例句
Right. And the phone number?
好的。电话是多少？
Speech is silver,silence is gold.
言语是银，沉默是金。
The pilot managed to circle the balloon for some time.
飞行员设法绕着气球飞了一阵。