1.When we have runoff from the urban environment, it could be carrying with it contamination due to animal waste (and) sewage overflows;

due to 由于；應歸于，應歸功于；應歸咎于；因…而產生，(作為結果)發生

It was a real prize due to its rarity and good condition.
因為稀有并且品相完好，它價值連城8L(=&Bg0zizjJ(7^Tn。

The traffic accident was allegedly due to negligence.
這次車禍據說是由于疏忽造成的q!p=ksN@;%+1hMQX_h)r。

2.and if those enter the beaches through the normal pipes that terminate in the ocean,

terminate in 以...結尾，結局是...

Jane's unhappy married life terminated in divorce.
珍妮的不幸婚姻以離婚而告終VeL+AeT#80.9oI%&。

Our engagement with the Sitwell Company terminated in May.
我們與西特威爾公司的合同五月到期vP9*rS]e2.S。

X[K=o_ez)f(!FXIda0~]mfy)AoE%mrU=Rln]_wWTP.snc+ 來源:可可英語 http://www.ccdyzl.cn/broadcast/201507/386301.shtml