Commonly used cuttage, engraft and layering are progenitive, also can sow.常用扦插.嫁接和压条繁殖, 也可播种.Objects To explore the factors of influencing for the cuttage seedling of Akebia trifoliate.目的探讨影响三叶木通扦插育苗的因素.Cuttage uses soft...
The first organisms that reproduced sexually were free-floating plankton.最早开始有性繁殖的生物是四处漂浮的浮游生物。The fish live on the plankton.这种鱼靠吃浮游生物为生。Plankton is at the bottom of the marine food chain.浮游生物处于海洋食物链的最底层....
More vigorous action is needed to force the federal army to disengage.需要更强有力的行动来迫使联邦军队撤军。Twenty eight percent of the federal budget is spent on defense.28%的联邦预算用于国防。Federal leaders continued their efforts to secure a cea...