If the current trend continues, black farmers in the United States may be extinct by the end of this decade...如果当前趋势继续发展下去，美国的黑人农民将在这个十年末不复存在。...efforts to build up the prestige of the United Nations...为树立联合国的威望所作的努力I sc...
以苯胺和溴乙烷为原料,用四乙基氢氧化铵作相转移催化剂,在常压下合成N, N二乙基苯胺.N, N - diethylaniline was synthesized under normal tempreture with tetraethyl ammonium hydroxide as phase transfer catalyst.利用β-环糊精-1,2-二溴乙烷乙醇混合体系作增敏剂首次提出了用荧光光度法测量阿苯达唑含量的方法.A fl...
原来的柏油操场已经覆上了草皮或种满了鲜花。The asphalt playgrounds have been grassed over or sown with flowers.儿童会通过在操场上对打或互骂的方式解决争端。Children would settle disputes by trading punches or insults in the schoolyard.伊莱恩走到外面查看操场。Elaine went outsid...
She was fishing around in her handbag trying to find the key.她在她的手提包中摸索着找钥匙。Judy reached into her handbag and handed me a small printed leaflet.朱蒂把手伸进提包，拿出一张小的印刷传单给我。A crumpled scrap of paper was found in her handbag...在...