图为1948年一女性在被炸毁的柏林筛沙。

Here, a woman sifts sand in bombed out Berlin in 1948.

youdao

无论是挂板还是沉积物，靠近虾池排水口的水域沙筛贝附着密度较低，而远离虾池排水口的水域沙筛贝附着密度较高。

The density of Mytilopsis sallei near outfall of shrimp pond was higher than that far from outfall of shrimp pond both on panel and in sediment.

youdao

覆沙和修补需要筛过的沙子。

Sieved sand consistent with construction sand for topdressing and repair works.

youdao