density
n
1 [U] quality of being dense(1b, 2) 浓度; 密度
the density of a forest, the fog, etc 森林的密度、 雾的浓度.
2 [C, U] (physics 物) relation of mass to volume 密度(质量与体积的关系).
When the plants are in the ground I'll put some powder on the soil.
白菜在地里生长时,我得在土壤里施些肥粉。
Do you remember one afternoon ten years ago when I came to your house and borrowed a necklace of yours? Pierre, my husband, was working in a government office. We'd been invited to a ball at the palace so I needed to borrow some jewellery.