Permant
帕马特低膨胀系数
🗣️ 情景例句
Lacks confidence and poise is nervous and ill at ease.
信心不足，不够自信，精神紧张，心神不定。
How much is it by registered mail?
挂号信要多少钱？
A sound made by tapping on the hull of a ship will be reflected from the sea bottom,
敲打船体所发了的声音会从海底传回来，