up and down

听听怎么读

英 [ʌp ænd daun]

美 [ʌp ənd daʊn]

是什么意思

释义

上上下下；起落；

英英释义

up and down

adv.
- moving backward and forward along a given course
- alternately upward and downward

学习怎么用

双语例句

They are getting up and down all the time.
它们总是不停地上上下下跑。
I've looked high and low for my wallet.
我上上下下地找我的钱包。
The lion paced restlessly up and down in its cage.
狮子在笼子里不安地来回走动。
It takes me an hour to walk there and back.
我步行一个来回用一小时。

权威例句

Up and Down법을 이용한 목재와 목질재료의 연소시험
Up and down
Up and down
Up and Down With Ecology: The Issue Attention Cycle
Up and Down with Ecology
Psychosomatics and psychopathology: looking up and down from the brain
Staircase bioassay: the up-and-down method.
Up and down states in striatal medium spiny neurons simultaneously recorded with spontaneous activity in fast-spiking interneurons s...
Up-and-down regulation of skeletal muscle acetylcholine receptors. Effects on neuromuscular blockers
The Up-and-Down Method with Small Samples*
Root-to-shoot signalling: Assessing the roles of ‘up’ in the up and down world of long-distance signalling in planta
The emergence of Up and Down states in cortical networks
Improved up-and-down designs for phase I trials.

同义词

to-and-fro hither and thither high and low here and there far and near all round all over the place all over all around all about

u开头的单词