keep off 关闭; 阻挡 【语境领悟】 *Mobile phones should be kept off during the meeting. 在开会期间手机应该关闭。 *The old umbrella can’t keep off the rain. 这把旧雨伞不能挡雨了。 *We kept on talking to keep off sleepiness. 我们不停地谈话, 免得老想睡觉。 *We hope the rain will keep off later. 我们希望雨过会下。

课本要点点拨