英语释义
1
n a condition requiring relief
2
n anything that is necessary but lacking
3
n the psychological feature that arouses an organism to action toward a desired goal; the reason for the action; that which gives purpose and direction to behavior
4
n a state of extreme poverty or destitution
5
v require as useful, just, or proper
7
v have or feel a need for
8
r in such a manner as could not be otherwise