33. A Deadly Current p.213

    it is a pity that every summer a few people drown at the beach. In some cases, these people were good swimmers. So how did it happen？ Riptide！

    Riptide is a strong underwater current. It moves quickly away from shore and out to sea. It appears suddenly and pulls its victim under and far off shore. Therefore, people should make it a rule never to swim too far out from the beach.

    If you find yourself in a riptide, don't panic. And by no means should you try to go against the tide and swim back to shore. You'll tire yourself out and probably drown. Instead, swim parallel¹ to the beach. A riptide is very narrow. So just a few strokes² in the right direction and you'll be out of danger.

    be all ears 洗耳恭听

    You are dead right. 对极了    dead adv.绝对地，完全地   deadly 致命的

    be at sea    When we talked about business, I was at sea.   I am puzzled by what you said.

    I make it a rule to get off early.

    be in the habit of

    By no means is he nice.  By no means did he tell the truth.

    instead, …… = on the contrary

    stroke³ n.（游泳的）划