You don't have to go running upstairs every time she rings.用不着她一来电话你就往楼上跑。If the phone rings say you'll call back after dinner.如果有电话打来，就说你吃完饭再回电话。In graphite sheets, carbon atoms bond together in rings.石墨层中的碳原子...
The room was quiet; no one volunteered any further information.房间很安静，无人主动提供更多的信息。If you'd like more information, ring the Hotline on 414 3929.如果想了解更多信息，请拨打热线电话4143929。The material consisted only of already published...