fertility ratio 中文意思是什麼
fertility ratio
解釋
人口出生率-
The black earth is a kind of alfisol, with a thick layer of humus, loose texture, high fertility, high porosity ratio, poor permeability and a high content of clay, which is suitable for cultivation
摘要黑土是一種腐殖質層厚，質地鬆散，肥力很高，孔隙比較大而透水性差，粘粒含量高，適于耕作的淋溶土。 -
With the development of human society, because of the lack of sustainable utilization consciousness, and the eager for quick success and instant benefit, the black earth suffered excessive cultivation and management, causing the reduction of its recycled ability, decrease in organic content, porosity ratio, fertility dropped and the properties of water retaining and water retention, which make the black soil harden and degenerate seriously
但是隨著人類社會的發展，在缺乏保護和可持續利用意識、急功近利思想影響下，黑土遭到過度墾殖和掠奪式經營，人類對其活動范圍遠遠超過了其再生能力，導致有機質含量減少，肥力下降，孔隙比減小，保水持水能力降低，土壤板結，黑土嚴重退化。 -
Female mice serum and vaginal secretion antibodies, their fertility and the pathological changes were determined. on the other hand, the effects of the anti - serum against synthetic peptide on the sperm - egg interaction during ivf and the location of p3 peptide in sperm were watched. the main results and conclusions were as follows : 1 ) the new antigen p3 peptide which harvested from the 430a peptide synthesizer were verified by the mass spectrograph and hplc, that the ratio of mass / charge of the synthetic peptide was equal to the molecular weight in theory and its purity was above 95 %
本研究的主要結果和結論如下：一、經抗原分子設計，在430a自動肽合成儀上合成的新抗原p3 ，經質譜儀分析證明其荷質比與理論一致；純化后，其純度大於95 ；將新抗原與klh偶連后免疫小鼠，經westernblot證實其誘導的特異性抗體可識別小鼠、大鼠、人睪丸組織中分子量約為22kd和55kd左右的蛋白質。 -
Based on the cultivated land fertility, according to grain yield, the planting coverage, the ratio of the grain crops to industrial crops and multiple crop index, the cultivated land population carrying capacity in 2010 and 2030 at the different population increasing modes were attained by predicting and analysing the food produce and the cultivated land carrying capacity
摘要以耕地地力為基礎，根據糧食單產、種植面積、糧經比和復種指數對河南省糧食產量和耕地資源承載力進行了預測和分析，得出不同人口增長模式下的河南省2010年和2030年耕地資源人口承載力。 -
In reproductive phase, however, the ratio of low - fertility plants first increased then decreased as genetic relation between exogenous donors and a. thaliana reduced
但在生殖生長階段，低育性株率的變化隨著親緣關系的從近到遠呈現出一種先升高再降低的變化趨勢。 -
When fertility drops to a particularly low level below replacement and the mortality rate remains low, the pace of population aging inevitably quickens. the overall dependency ratio is projected to rise from 381 in 2002 to 562 in 2031. the elderly dependency ratio is expected to increase gradually from 158 in 2002 to 198 in 2016, followed by a marked rise to 380 in 2031
二零零二年，每千人的撫養率是381 ；到二零三一年，每千人的撫養率估計會上升至562 ；而老年撫養率會由二零零二年的158 ，逐漸上升至二零一六年的198 ；到了二零三一年，更會顯著上升至380 。
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