Foundations
辅助 Assistantn. 地基
✅ 同义词
🗣️ 情景例句
She's nine years old.
她九岁。
Life is half spent before we know what it is.
等到认识人生，已经一半过去了。
Experiments have proved that children can be instructed in swimming at a very early age.
实验证明，儿童在很小的时候就可以开始学习游泳。