Cows and sheep are herbivores.牛和羊是食草动物.In many communities insects play a key role as herbivores and predators.在许多群落中,昆虫作为植食动物和捕食者起着重要的作用.Being herbivores, guinea pigs eat almost constantly, and metabolize food very quic...
There are several other excretory mechanisms in earthworms.蚯蚓有好几种排泄机制.Describe the excretory system of the genus Nereis briefly.简述沙蚕属的排泄系统.an excretory organ of certain invertebrates.某些无脊椎动物的排泄器官In the earthworm and many...
绝大多数成功人士都有共同的特质：脾气倔强，性格刚强。Most of successful men have the characteristics of contumacy and doughty.她有志气、性格刚强,有助于她渡过难关.Her courage and good humour saw her through the bad times.《伊利亚特 》 里的早期希腊人是刚强的战士.These early Greeks of ...
An active and expansive market economy is a necessary condition for progress.积极扩张的市场经济是发展的必要条件。They have played an expansive style of rugby.他们采用向外展开打法打了一场橄榄球。She opened her arms wide in an expansive gesture of welcome.她展...