There is a trend for knocking public-school headmasters and headmistresses off their perches.现在有一种推翻公立学校校长权威性的趋势。Other protection can be obtained by providing wooden perches througout the orchards.其它保护措施是可在种子园中到处设置木制的栖木....
也可用雌性F1与隐性纯合雄性亲本回交.F 1 females could be backcrossed to the male homozygous recessive parent.该方法可以很方便地应用于实际的回交育种.The method can be conveniently applied to practical backcross breeding programs.聚类分析发现方正银螂最先与异育银螂聚成一支, 再与异育银...
这些大机构总是随意制定规定，而且说变就变。These large institutions make — and change—the rules to suit themselves.他总是渴望拥有新的经历，而且永远愿意尝试。He is always eager for new experiences and ever-willing to experiment.满眼金星乱转，而且越转越快。Stars appeared everywh...