beat v. 打,敲;击败,胜过;[音]打(拍子),(心脏等)跳动
beating against/on sth. /打在……上
the heart beats. /心脏跳动
beat sb. /战胜……a heartbeat /心跳声;
beautiful adj. 美丽的;很好的;
beauty n. 美,美丽;美人,佳人;美的事物
the beauties of nature/大自然的美
beauty art/ 美容术,化妆术
beauty contest/选美会
because conj. 因为;
become(became, become, becoming) v. 变为,成为;
begin (began, begun, beginning) v. 开始,首先
begin to do sth. /开始……
begin doing/开始