A large number of limnetic macro algae fossils were found in the Chang6 reservoir in Ansai Oilfield, which proved the existence of macro algae in the Mesozoic.(安塞油田長(zhǎng)6油層發(fā)現(xiàn)了大量的淡水宏觀藻類化石，證實(shí)了中生界宏觀藻類的存在。)

There is the rich limnetic resources in Chinese vast inland water area, the safety of limnetic products have become increasingly prominent problem in recent years.(我國(guó)遼闊的內(nèi)陸水域中有著豐富的淡水資源，近幾年淡水產(chǎn)品的安全性問(wèn)題日益突出。)

The conclusion is that the sedimentary environment of coal measures in Changyang area, Shuangyang basin is mainly fan delta and limnetic deposits.(得出的結(jié)論是：雙陽(yáng)盆地長(zhǎng)嶺區(qū)煤系地層沉積環(huán)境主要為扇三角洲沉積和湖泊沼澤沉積。)

It is nourished mainly by dead matter that falls from the littoral and limnetic zones and by sediment washing into the lake.(它主要由落從海濱和淡水的區(qū)域和由洗滌入湖的沉積的無(wú)機(jī)物養(yǎng)育。)