The mechanism most often advanced to account for

the observed bacterial reduction of HCt in soils and

aquifer materials involves the production of extracellular

polymers (Allison 1947; Shaw et al. 1985). Vandevivere &

Baveye (1992a) showed, however, that the production of

extracellular polymers was not necessary for severe bacterial

clogging to occur. Other mechanisms that may come into play

and have been invoked occasionally in the literature include

plugging of the pores by the bacterial cells themselves

(Gupta & Swartzendruber 1962), precipitation in soil pores

of iron and magnesium sulphides resulting from the activity

of sulphate-reducing bacteria (Ford & Beville 1968; Van

Beek 1984), deposition of iron hydroxides or manganese

oxides produced by iron bacteria (Van Beek 1984), or

the production of gas (Ahmad 1963), in particular by

denitrifiers (Lance & Whisler 1972; Oberdorfer & Peterson

1985) and possibly by methanogens (Swartzendruber &

Gupta 1964; Gupta & Swartzendruber 1964; Reynolds et al.

1992).

先进机制通常占观察细菌减少HCt在土壤和地下蓄水层材料涉及的生产胞外聚合物(Allison 1947;肖et al . 1985年)。Vandevivere & Baveye题为(1992)表明,然而,胞外聚合物的生产并不是严重的细菌堵塞发生的必要条件。其他机制发挥作用,偶尔在文学包括调用堵塞毛孔的细菌细胞

你自己看看 是不是对的！！！！

以我的水平是还暂时达不到翻译的能力，但我想看看老师们的答案，这样可以提供一个学习的机会给自己！

专业英语。

看我的昵称就知道我翻译不了呀

:呵呵！过六级也不错。