doatvi.衰老;年老昏愦=dote.
dov.做;干n.注意事项;<非正式>聚会;<古>事情
doubling measure加倍测度
Doppler relation多普勒关系
do some shopping买东西, 购物
do sb. a favor给某人以恩惠, 帮某人忙
do a good job of把 ... 做好
do a snow job on使…上当,哄骗…
Do not litter.请勿乱丢垃圾。
do as you please按你喜欢的做
doppler spectrum多普勒频谱