词汇	a piece of chalk
释义	a piece of chalk短语⁴⁶³⁴⁸一支粉笔课堂互动
随便看	selective call line telephone selective call number selective call party-line selective breeding selective breeding effect selective breeding new strain selective breeding of forest tree selective breeding of livestock Selective breeding of Tongcheng swine selective broadcasting selective broadcast receiving station selective broadcast receiving station, SBRS selective broadcast sending station selective broadcast sending station, SBSS selective bronchial arterigography selective bronchography selective broth medium selective browsing selective brushing selective buying selective call selective call acceptance selective call decoder selective call encoder selective call forwarding