1. He was prevented by illness from joining the expedition.
   他因病不能加入探险。
2. The Brook joins the river.
   小溪同河流汇合。
3. No country joined in Japan's protest.
   没有国家参与日本的抗议。
4. We were afraid you wouldn’t be able to join us.
   我们还担心你们不能参加我们一道干哩。
5. We've decided to join you in the demonstration.
   我们已决定要加入你们的示威游行。

　2个形容词解释