基本解释n.石墙填心石块同根派生 英汉例句We had better learn by heart as many sentence patterns as we can.我们最好尽可能多背句型。Slowness of the heart rate, usually fewer than60 beats per minute in an adult human being.心搏缓慢心律缓慢，通常指成人心跳低于60次每分钟