A fertility rate of around 2.1 is considered the level a population can replace itself.

Nugent says statistics on the fertility rate were also revealing.

Nugent说 人口出生率的统计数据也揭示了这一点.

The fertilization after be being cut every time waters.

每次剪后施肥浇水.

Different fertilization had significant effects on the contents of DTP in leachate.

不同的施肥条件显著影响渗漏水的DTP含量,NP处理 最高,DTP含量达到了0.047mg·L-1.

Mammalian spermatozoa go through process of epididymalmaturation to develop their capacity for fertilization.

随着精子在附睾中的转运,它们与卵子质膜的融合能力逐渐增加.

The main reason is the effect of fertilization rate.

主要原因是施肥量的影响.

The management and maintenance practices of golf course mainly include irrigation , fertilization , insects and disease control.

高尔夫球场的养护主要包括草坪的水肥管理、病虫害管理等方面.

The results indicated that soil biomass carbon and nitrogen were remarkably influenced by fertilization.

结果表明:长期不同施肥处理对土壤微生物量碳和氮产生显著影响.

The characteristics of soil and fertilization of fruit vegetable in solar greenhouse in Beijing were investigated.

本文对京郊日光温室的土壤环境特征、施肥特征以及施肥对土壤环境和黄瓜产量、品质的影响进行了研究.

the development of in vitro fertilization

体外受精的研究发展

Fertilization, the process in which the man's sperm joins the egg, takes place in the tube.

受精是男性精子与卵子在输卵管结合的过程.

Is It'so far removed from in vitro fertilization?

它与人工受精确实差别很大 吗 ?

Fertilization which was related to fertilization amount and different growth stages improved photosynthetic rate of leaves.

增施肥料提高了叶片光合速率,并且它与施肥水平和生育阶段有关.

The red band signals a chemical reaction that follows fertilization.

卵上的红带表示卵受精后的化学反应.

Zona pellucida protein surrounding to oocyte is important in the proc ess of fertilization.

卵透明带蛋白围绕在卵母细胞外,在受精过程中起着重要作用.

Fertilizer is a substance put on land to fertilize it.

肥料是施在地里使之肥沃的物质.

Self sustaining gardening has to do with allowing foods to self fertilize.

自我维生菜园与允许植物自我施肥有关.

Animal an and crop waste can be used to fertilize the pond and feed the fish.

动植物产生的废物可以为池塘施肥和喂鱼.

A tablespoon of human semen contains enough sperm to fertilize every woman in North America.

一小勺的精液里含有的精子足够让每一个北美的女人都怀上孩子.

We shoudl fertilize soil if we want to grow healthy plants.

如果我们要使农作物健康成长我们必须为土壤施肥.

The peasants fertilize the field by using manure.

农民们施肥来使土地肥沃.