It enter the late blastula stage in 6 h 50 min.6小时50分进入低囊胚期.The cells of the blastula , called blastomeres, also each receive a full diploid set of chromosomes.这些囊胚细胞, 称卵裂球, 每个细胞都有一套二倍体染色体组.The outer layer of a blastula ...
Give the cardboard two or three coats of varnish to harden it.在纸板上涂两三层清漆使其变硬。Rub the surface of the wood in preparation for the varnish.打磨木头的表面，为刷清漆做准备。You will need to apply three coats of varnish.需要刷三层清漆。...
Hotels have taken the place of old inns.旅馆已代替了旧的客栈.Such inns as there were were generally dirty and flea ridden; the food simply local cheese accompanied were by bread often twelve months old, all washed down with coarse...
The scale of reduction of a microform.缩微印刷品的缩小比例.A device for reading materials in microform, such as microfilm and microfiche.显微阅读器用以阅读缩微成像, 如缩微胶卷和缩微平片上的材料的仪器.Audio - visual materials and microform materials are not inc...