principal

• A school is a principal 's jurisdiction .
  学校归校长管辖。
• I have to consult my principal .
  我必须和我的委托人商量。
• The principal criminal was sentenced to life imprisonment .
  这个主犯被判无期徒刑。
• Slang had been a principal component of his rattling .
  他唠叨的主要是一些假语村言。
• Bear in mind that the chief ray is now principal ray .
  记住，此时主光线就是主点光线。
• The navy is our principal bulwark against invasion。
  海军是我们抵御侵略者的重要保障。
• A principal criminal fell into the net .
  要犯落网。
• I must consult my principal .
  我必须同委托人商量。
• I never was the principal .
  我从来就不是什么资本。
• Two principal ports in north africa are seriously blocked .
  北非两个主要港口遭受严重封锁。