depression
n
1 [U] being depressed; low spirits 憂愁; 沮喪; 消沉
He committed suicide during a fit of depression. 他一時(shí)想不開, 自殺了.
2 [C] hollow sunken place in the surface of sth, esp the ground; dip 凹陷處; (尤指)洼地, 坑
depressions on the face of the moon 月球表面的凹陷處
The soldiers hid from the enemy in a slight depression. 士兵們隱藏在低洼處, 躲過了敵人.
3 [C] period when there is little economic activity, and usu poverty and unemployment 經(jīng)濟(jì)蕭條期.
4 [C]
(a) (winds caused by a) lowering of atmospheric pressure 氣壓降低(形成的氣流).
(b) area where this happens 低氣壓區(qū)
a depression over Iceland 冰島上空的低氣壓區(qū). Cf 參看 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.