Habitat loss and fragmentation is the primary cause of population, metapopulation and species extinction worldwide.

生境丧失和破碎化是生物多样性丧失主要原因，并得到了广泛关注。

Demonstrates efflux force plays primary role in segregative effect of air curtain.

指出气幕流力对气幕隔断作用起主要作用。

Protoxylem The PRIMARY XYLEM elements that are formed from the procambium first.

初生木质部成分，最早由原形成层形成。

Background—The nucleus tractus solitarius (NTS) is the primary integrative center for baroreflex.

背景-孤束核为压力感受器主要中枢。

Primary violarite has comparatively big particle size,and it is considered the easiest flotation copper-niekle-sulphide ore.

紫硫镍铁矿原生粒度较大,被认为是最易浮选硫化铜镍矿物。

The primary task of the chair is to ensure the meeting runs smoothly.

主席首要任务是确保会议顺利进行。

Results OSAHS can be misdiagnosed as primary hypertension, arrhythmia, asthma,acalcerosis and some other diseases.

结果OSAHS易被误诊为原发性高血压、经官能症、儿童弱智、缺钙、心律失常、哮喘等。

Intake in state primary schools is down by 10%.

公立小学入学人数下降了10%。

This is the primary impetus behind the economic recovery.

这是促使经济复苏主要动力。

Primary repair for an abdominal wall defect with nonabsorbable sutures is advised when feasible.

如果情况允许话，术中可直接用不可吸收修补腹壁缺损。

By pre aeration in tanyard wastewater, the effect of primary settling improves obviously.

制革污水采用预曝气处理后，可大大提高初沉池沉淀效果。

Objective To investigate the clinical features of primary angiitis of the central nervous system (PACNS).

摘要目探讨原发性中枢经系统血管炎(PACNS)临床特点。

Objective To explore the surgical treatment of primary small-cell esophageal carcinoma(PSEC).

目探讨原发性食管小细胞癌外科治疗方法。

Field cancerization was the base of double primary lung cancer.

区域性癌化是双原发性肺癌发生病理基础。

Acropetal differentiation of the cambium layer continues as the primary root elongates.

形成层向顶分化像初生根伸长一样在继续进行。

The primary function of a house is to provide warmth and shelter.

住宅最基本功能是提供温暖，遮蔽风雨。

The first case was diagnosed as primary pesticemia late progressed to lung plague. 4 cases were transformed from pesticemia out of 13, leaving the 9 cases as primary lung plague.

首发病例为原发性败血型鼠疫继发肺鼠疫；其他为原发性肺鼠疫继发败血型鼠疫4例，原发性肺鼠疫9例。

Depending on the chemical composition the structural parameters of the melilite vary in the range between gehlenite and mernite.Melilitic separation and melilite as a primary phase are very rare.

黄长石结构参数，按其化学成分是在钙铝黄长石和镁黄长石之间变化，黄长石作为原始矿物相在碱性矿渣中比较罕见。

In this paper,the cam explorator in contour lathe is designed direct according to the contour of primary products with the mathematical analogue of the working course of the cam。

通过对凸轮加工过程数学模拟，利用原始产品凸轮外形直接设计凸轮仿形车床靠模。

By making a primary orthogonal regression test, the major factor and best parameter combination were found out, which supply theoretical basis for further research on awn-removed principle and awner.

通过一次回归正交试验找出了影响除芒效果主次因素和最佳参数组合，为进一步研究除芒机理与机具提供了依据。