Prinipal
[機] 頭, 支配者; 主要的, 第一位的
??? 情景例句
I see, it's not easy to marry and start a family. So when's the wedding?
我明白，要組織一個家庭并不容易。那么婚禮訂在哪天舉行？
If it hadn't rained so hard yesterday, we would have played tennis.
如果昨天沒下那么大的雨，我們就去打網球了。
that the traveller abroad thereby denies himself the opportunity of getting to know the people of the country visited.
說這種封閉的作法使到國外旅游者失去了了解所去國家人民的機會。