Sparkplug
vt. 倡导, 激励\\nn. 火花塞, 中坚
✅ 同义词
🗣️ 情景例句
Always remember to wash your hands before eating.
用餐前谨记要洗手。
John could not decide when to leave.
约翰无法决定几时要出发。
What is more, this information line operates 24 hours a day.
而且，这种"问讯线路每天工作24小时。