depression
n
1 [U] being depressed; low spirits 忧愁; 沮丧; 消沉
He committed suicide during a fit of depression. 他一时想不开, 自杀了.
2 [C] hollow sunken place in the surface of sth, esp the ground; dip 凹陷处; (尤指)洼地, 坑
depressions on the face of the moon 月球表面的凹陷处
The soldiers hid from the enemy in a slight depression. 士兵们隐藏在低洼处, 躲过了敌人.
3 [C] period when there is little economic activity, and usu poverty and unemployment 经济萧条期.
4 [C]
(a) (winds caused by a) lowering of atmospheric pressure 气压降低(形成的气流).
(b) area where this happens 低气压区
a depression over Iceland 冰岛上空的低气压区. Cf 参看 anticyclone.
And so with solids such as a shell, a nut, a plum, a pear, a tadpole, a mushroom, a mountain peak, a kidney, a carrot, a tree-trunk, a bird, a bud, a lark, a ladybird, a bulrush, a bone.