在群落交错区范围内,通常划定群落片段的边界并不太困难.The delimitation of stands within ecotons generally gives on difficulties.对于陆地群落,最主要是可用性和温度.For terrestrial communities the principal variables are availability and temperature.动物群落与沉积环境有直接关系.F...
strip flipper板料弹动器Flipper? Maybe those frisky crowd - pleasers at the aquarium?鳍状肢? 或许是水族馆中那些活泼逗人的生物?The seal's flipper is homologous with the human arm.海豹的鳍肢与人类的手臂同源。It's almost like a flipper action as she ki...
...all the joys and heartaches of parenthood.为人父母的所有快乐和痛苦Mrs. Cherry seems altogether weighed down by her work plus parenthood.彻里夫人似乎被她的工作和母亲的责任累坏了。The responsibilities that appertain to parenthood were discussed at the ...