up-and-down

He kept bouncing up and down like a yo-yo .

他像个悠悠球似的蹦蹦跳跳。

I walked up and down the aisle to stretch my cramped muscles.

我在楼道里走来走去以舒展我痉挛的肌肉。

Two elliptical crystal analyzers are symmetrically arranged in the up-and-down direction, the space-resolved spectrum is recorded with a soft X-ray CCD camera in the upper channel, and the time-resolved spectrum is recorded with a soft X-ray streak camera in the lower channel.

将两个完全相同的椭圆晶体分析器进行上下对称布置，在上通道用软X射线CCD相机测量空间分辨光谱，在下通道用软X射线条纹相机测量时间分辨光谱。

It's very hard to turn the wick up and down.

这灯芯很难旋上旋下.

There's a lot of rushing up and down the gangways.

舷梯上许多人上上下下。

He looked up and down the rain-swept street.

他仔细打量着被雨水冲刷的街道。

People were parading up and down showing off their finest clothes.

人们走来走去，炫耀着他们最漂亮的服装。

The Up-and-down Speed Control of Stepping Motor in Jet Graph Plotter

喷墨绘图仪中步进电机的升降速控制

Everybody still jumps up and down about being rid of tyrants.

大家都还在为摆脱了暴君的统治而激动不已。

Tiny boats bobbed up and down in the harbour.

小船在港湾中颠簸。

They fasten and strengthen the music of the Goose Wastrel to match the up-and-down glide of wind music, which show the concept of war and sound a bugle call in the battlefield.

把流水板的《鹅浪子》加快速度、加重节奏，配以管子的上下大滑和快速吞吐，便出现了人喊马嘶、冲锋陷阵的意境，而成为战场上的进军号角。

Prices have gone up and down like a seesaw this year.

今年的价格像跷跷板一样时涨时跌.

These ideas are favored because such actions required up-and-down motions of the arm, and fossil evidence indicates that the dino king was incapable of rotating or twisting its arms.

这些解释之所以比较可信是因为这些事都必须利用手臂的上下活动，而化石显示霸王龙的手臂是没办法旋转的。

The boat rocked up and down in rhythm with the sea.

小船随着海浪起伏有致。

All up and down the street the windows bang shut.

整条街的窗户都砰然关上了。

He learned to walk safely up and down stairs.

他学会了安全地上下楼梯。

" It was kind of an up-and-down night," Hughes said.

休斯说：那晚上真的是七上八下。

A ragtime dance characterized by a springy walk with the feet well apart and a swinging up-and-down movement of the shoulders.

一种繁音拍子的舞蹈，其特点是双足充分分开，有弹性地舞步，双肩上下摇摆扭动。

The up-and-down temperature rate is less than 1 ℃/ min;

控制升降温速率小于1℃/min；

We'll kick up a stink (= complain a lot and cause trouble) if they try to close the school down.

假如他们想关闭这所学校，我们就要大闹一场。

She paced up and down outside the room.

她在屋子外面来回走着。

Ranges of mountains stretched up-and-down with various shapes. It was very significant.

群山联绵起伏, 姿态各异,非常壮观.

A young lady fan of Hong Kong star Andy Lau has experienced an extreme up-and-down of her life.

几天之内，香港巨星刘德华的一名年轻女歌迷生活发生巨变。

Do you get puffed out running up and down the stairs?

你要是在楼梯上跑上跑下的会不会喘不过气来？

He looked her up and down and decided to ask her out.

他上下打量她,并打算邀她出去.

Crawl: A stroke made in the prone position characterized by alternate over arm movements and a continuous up-and-down kick; originally known as the Australian crawl.

即采用俯卧姿势，以双臂连续轮流划水、双腿上下连续打水为特点，最初通称为澳大利亚爬泳。

A little bird was bobbing its head up and down.

一只小鸟把头上下快速摆动着.

I strolled up and down thoughtfully before calling a taxi.

我踱来踱去仔细思量后叫了一辆出租车。

He jigged up and down with excitement.

他激动得又蹦又跳。

Farming has been an up-and-down industry.

务农一直是起伏不定的行业.