adj. 不断的,持续的;永恒的,始终如一的;坚定;忠实的;
n. [数]常数,常量;不变的事物;永恒值;
con始终+stant站立→始终站着→不变的
🗣️ 情景例句
Don't forget to bring me a souvenir.
别忘了给我带回点儿纪念品。
What time are you leaving?
你几点钟走?
it requires 97 per cent less energy to travel the quarter of a million miles from the Moon to Earth-orbit than the 200 mile-journey from Earth's surface into orbit!