back marsh;back swamp是什么意思

用法例句

A sediment core of 549 cm is collected from the river floodplain of Yellow River in Sanmenxia Reservoir for the test of the concentrations of organochlorine pesticides(OCPs) and minerals.

沉积柱取于三门峡水库黄河河漫滩,总长549 cm,采用GC-ECD气相色谱仪和X射线衍射仪分别测定了沉积物中有机氯农药的质量分数和矿物成分。

Man-made radionuclide of Cesium-137 can be as environment tracer to research the sediments on river floodplains.

人工同位素137Cs可以作为环境示踪因子研究河漫滩沉积物。

Based on data from random sampling method repeatedly,aquatic plants have been surveyed twice in the middle and lower reaches of Jinsha River floodplain.

采用随机多次小样本法,对金沙江中下游河漫滩水生植物进行了2次调查。

Based on analyzing the historic literature and the grain size and the susceptibility for 110 samples in the Gaoling Weihe river floodplain,the character of magnetic susceptibility was researched whthin the depth of 4.

根据史料记载以及高陵渭河河漫滩沉积物共110个样品磁化率、粒度成分的测定分析,研究了近120年来,该地区沉积物在0~4。

It is seldom to reveal the change law of water environment during history through viewed from floodplain deposits.

长期以来,人们对渭河的水环境问题已有关注,但研究大多集中在对较大范围的区域地貌和历史时期河道变迁的研究中,通过河漫滩沉积物来揭示历史时期渭河水环境演变规律的研究还少见报道。

Studies on the biomass of three herb communities in flood plain of Fen river, Taiyuan;

汾河河漫滩三种草本植物群落的生物量研究

This paper describes the distribution, profiles, soil courses and their physical property of the downstream valley flats of Yangzi River.

综述长江中下游河漫滩的分布,剖面结构、土层及其物理力学性质。