Infructuous
a. 不结果的, 徒劳的
🗣️ 情景例句
You must be hungry by now.
你现在一定饿了。
The wolf and fox are both privateers.
狐狸与狼，抢劫大王。
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。