If group effort is to be effective, people must know what they are expected to accomplish . 如果要想群体的工作更有效率，必须使人们知道他们所期望达到的是什么。
The growth rate and winter hardiness trends are the opposite of those found in the interior population . 这种生长速度和耐寒性变化的趋势是与内地群体发现的情况相反。
The two terms are applied so loosely and so imprecisely by mr. mclennan to the organized groups . 麦克伦先生极为随便地，极不精确地把这两个术语应用于一些有组织的群体。
Microscopic examination of this sludge reveals that it is formed by a heterogeneous population of microorganisms . 微观检验这些污泥，发现它们是由异质微生物群体所构成的。
The range of immune response in a large random population of animals tends to fellow a normal distribution . 在一个随机挑选的大的动物群体中，免疫应答的强弱是呈正态分布的。
many systematic surveys show that milk provides 60% of the total for a mixed population. 许多系统调查指出，对于混合群体来说，60的是通过牛奶摄取的。
Both sessile and floating types are known but most of the geologically important types were floating colonies . 固着的和浮游的两种类型都已发现，但大部分在地质上重要的类型都是浮游群体。
I have seen small population almost wiped out by fungus at the same time as dense aphis populations elsewhere . 我曾见到小的群体在其它任何地方的高密度蚜群被真菌杀死的同时差不多也被杀死了。
The environment of the river becomes more suitable for ciliates, which form the dominant group of animal plankton . 河流环境变得较适合纤毛类生物的生长，因而纤毛类成了浮游动物中占优势的群体。
The most striking illustration of this is the isolation of untransformed revertant cells from populations of transformed cells . 这方面最显著的例证乃是从转化细胞群体中分离出非转化的返转细胞。
