Convertion
[计] 规范
🗣️ 情景例句
I have been learning English for three years now.
我学英语有3年了。
Do you often doubt yourself?
你时常怀疑自己吗？
may have left an automatic messenger behind to await the possible awakening of an advanced civilization.
很可能会在离开太阳系时留下自动化信息装置，等待先进文明的觉醒。