Sparkplug
vt. 倡导, 激励\\nn. 火花塞, 中坚
✅ 同义词
🗣️ 情景例句
By the way, how is your wife doing, Harrison?
顺便问一下，贵夫人近来可好吗？
She's been living there since her birth.
她生下来就住那儿。
The Hubble telescope was launched into space by NASA on April 20,1990 at a cost of over a billion dollars.
哈勃望远镜于1990年4月20日由国家航空航天局发射升空，耗资10多亿美元。