Reaction variable
[化] 反应程度
🧩 词语组成解析
🗣️ 情景例句
She keeps all of her jewelry and valuables in a safe.
她把所有的首饰和贵重物品都放在保险柜里。
What''s the cause of the delay?
什么原因延误？
Li Lei ran much faster than the other boys.
李磊跑得比其他男孩快得多。