Variations
n. 变奏曲, 变更；变种（variation的复数形式）
🗣️ 情景例句
How can I reach you?
我怎样才能联系到你呢？
How much should people demand of their governments?
国民对其政府应该要求多少呢？
who rolled balls down inclined planes,
他就是那个使球体沿斜面向下滚动，