There are problems. One is that viruses tend to clump together, which hampers their performance.(这带来了一些问题，其一就是病毒倾向于簇集在一起而降低效能。)
Dickon and Mary had come upon a whole clump of crocuses burst into purple and orange and gold.(狄肯和玛丽发现一簇番红花突然冒出了紫色、橙色和金色的花朵。)
Should you try to cultivate a clump of nettles, and they don't do well, your soil is likely to be at the heart of the problem.(假若你种了一丛荨麻而它们又生长的不怎么样，可以得知你的土壤质量就是中心问题。)
He slogs through a muddy beach in the eastern Bay Area and scoops up a clump of seaweed that's home to clams and snails.(他跋涉过东部海湾区域的一片泥泞的沙滩，舀出了一团海藻，在这团海藻中栖息这很多贝类。)
Lulin, like all comets, isa clump of frozen gases mixed with dust.(鹿林彗星和其他彗星一样，是一堆冰气体和尘埃组成。)
But it is odd that countries should clump together into two broad clusters.(然而这些国家扎堆形成两个明显的集群就奇怪了。)
To clump them all into one category is to miss out on a huge treasure trove of learning opportunities.(把他们统统都笼统的归位一类，相当于让孩子错过一个学习机会的珍贵宝藏。)
So she took a clump of hair from my stunt double's wig and was going to pretend she had pulled it from my head.(所以她从我的特技替身那里拿了一撮头发拽在手中，然而装着好像是从我头上抓下来似的。)
“That one”, he says, waving at a clump of corrugated-iron sheds and belching chimneys, “is owned by a man from Shanghai.”(“那座”，他边说边示意那座波纹铁棚并且烟囱还在冒烟的工厂，“这属于上海老板”。)
They found that salamander regeneration begins when a clump of cells called a blastema forms at the tip of a lost limb.(他们发现，蝾螈再生是从一团被称为芽基的细胞在断肢顶端形成的时候开始的。)
