sought after
很需要的
all these skills are much in demand.
所有這些技術(shù)都十分需要。
When presented for payment
即期票據(jù)：見票即付的票據(jù)，
a note payable on demand.
一張見票即付的票據(jù)
When needed or asked for
有求必應(yīng)：處于被需要或被請(qǐng)求的時(shí)刻
fed the baby on demand.
無微不至地照料嬰兒