by the (thousands)

The steps had been worn away by the feet of thousands of pilgrims.(成千上万的朝圣者把台阶踏得磨损了。)

A rare tree frog, a mudfish and lizards are among the thousands of species threatened by extinction.(一种罕见的树蛙，泥鱼和蜥蜴都在成千上万种濒临灭绝的动物之中。)

Although many of his specific conclusions have been rejected or modified over the years, his ideas inspired thousands of studies by investigators all over the world.(尽管他的许多具体结论多年来被拒绝或修改，但他的想法激发了世界各地研究者的数千项研究。)

A much greater danger is faced by the thousands of species - including many large, photogenic mammals - living in tropical rainforests.(生活在热带雨林的成千上万的物种-包括许多体积大的上镜的哺乳动物-面临着更大的危险。)

Thousands of frogs croaked in the reeds by the riverbank.(成千上万只青蛙在河岸的芦苇中呱呱地叫。)

He tipped down in the direction of a herd of white-eared kob, streaming north by the thousands.(他斜拉着飞机朝一群白耳水羚的方向飞去，它们从北方涌过来，数量足有几千头之多。)

By far the largest cause of this human tragedy is that thousands of employees were heavily overweighted in Enron stock.(到目前为止，造成这场人间悲剧的最大原因，是数千名员工在安然股票中的持股比例过高。)

Once ingested by a caterpillar, the protein globule dissolves, releasing thousands of viruses, or virions, that after about two weeks multiply enough to fill the entire body cavity.(一旦被毛虫摄入，蛋白质小球就会溶解，释放出数以千计的病毒或病毒粒子，大约两周后这些病毒就会大量繁殖，足以填满整个体腔。)

The team were greeted by thousands of jubilant supporters.(该队受到了上千名欢欣鼓舞的支持者的欢迎。)

Officials appealed to householders to open their homes to the thousands of persons made homeless by the storm.(官员们呼吁住户们为成千上万因这次暴风雨而无家可归的人提供住宿。)