Springhead
n. 根源, 泉源
✅ 同义词
🗣️ 情景例句
to plan the refurnishing of the old library
计划重新整修老图书馆
I asked him a lot of questions.
我问他很多问题。
Only the Earth provides ideal conditions, and even here it has taken more than four billion years for plant and animal life to evolve.
只有地球提供理想的条件，而即使在这里，植物和动物的进化也用了40亿年的时间。