Small amounts of toxins such as ddt and other poisons , on the other hand , may not be a direct threat to people 另一方面,少量像ddt和一些其他的有毒物质不会对人体构成直接的危害。
Environmental toxins may be a common denominator here , according to davis and her colleagues 据戴维斯博士和她的同事们介绍,环境中的有毒物质可能是造成男孩出生数量下降的共同原因。
Mussels are able to accumulate toxic substances in their bodies , and have been used as bioindicators in many places 贻贝可在体内积聚有毒物质,因此世界许多国家以贻贝作为生物指标。
It provides full text searches of reviewed environmental internet content , news and links of more - over 3 , 000 sites 主要内容包括:环境可持续发展、土地、空气、海洋、水和有毒物质等等。
If food already contains natural carcinogens , it does not make sense to add dozens of new man - made ones 尽管食品中已经含有了天然的致癌物质,但是,再人为地增加一些有毒物质也是很不应该的。
We were told that we could die during a summer voyage , or our water system could be poisoned and so on 照他的说法,我们很可能就会在一次夏季航海中丧生,我们的饮用水系统受到有毒物质污染等。
There are more than 2100 known drinking water contaminants that may be present in tap water , including several known poisons 管道自来水中有2100种可知的饮用水污染物存在,包括一些可知的有毒物质。
If food already contains natural carcinogens , it does not make sense to add dozens of new man - made ones 尽管食品食物中已经含有了自然的致癌肿瘤物质,但是,再人为地增加一些有毒物质同时也是很不应该的。
Use keywords to search for pollution prevention ( p2 ) and toxics use reduction ( tur ) strategies . by the massachusetts toxics use reduction institute 可以用关键词搜索污染的预防和减少使用有毒物质的策略。
We have subjected enormous numbers of people to contact with these poiso , without their co ent and often without their knowledge 我们使众多的人接触这些有毒物质,却没有征得他们的同意,并常常将他们蒙在鼓中。