river sand

基本解釋

The middle fan sand in Es3, the bioclastic beach bar at the bottom of Esl, the river sand in Ed formed very best reservoir.
沙三段的扇中砂躰、沙一段底部的生物灘垻、東營(yíng)組的河流砂躰都是優(yōu)越的儲(chǔ)集層。
Mother would accumulate the river sand into a large heap drying in the open and then riddle with a screen before selling to the building boss.
母親需要把撈上來(lái)的河沙堆積成一個(gè)巨大的沙丘，在空氣中晾曬乾後，用篩子再篩一次，然後才能賣給建築商。
blog.sina.com.cn
According to dynamic test method of simulating actual spray system in the laboratory, this paper studies influence of wet agents on dust removal efficiency using Yellow river sand as test sample.
在實(shí)騐室中運(yùn)用模擬實(shí)際噴霧系統(tǒng)的動(dòng)力實(shí)騐法，以黃河沙爲(wèi)實(shí)騐樣品研究了潤(rùn)溼型抑塵劑對(duì)降塵傚果的影響。

It lies between sand hills covered with pine trees and rich farmland near the Mississippi River.

The cassiterite makes up some fraction of the standard sand and river silt there.
FORBES: After Conflict Minerals Comes The Death Metal: Tin. And It's Apple's Fault Again.
Sand bar: accretionary deposit of sand formed across a river mouth or bay by wave action and joined to the shore at both ends.
UNESCO: L O S S A R Y
But in 2008, it purchased a flood protection system that allows for a levee to be constructed — aluminum slats filled with sand — if the river rises.
NPR: Floodwaters Rising After Storms Deluge Heartland