1.
up and down, up and down.
上上下下，上上下下。
2.
All members of the family, old and young, are very pleased.
全家上上下下都很高兴。
3.
The children on the bus go up and down, all day long.
整天都被颠得上上下下。
4.
"Back and forth, up and down."
前前后后, 上上下下。
5.
he eyed him up and down.
他上上下下地打量他。
6.
they looked me up and down.
他们上上下下打量我。
7.
The chil-dren on a bus go up and down.
公共汽车上的 孩子上上下下，
8.
The children on the bus go up and down,
汽车上的孩子被颠得上上下下，
9.
The people on the bus go up and down,
公共汽车上的人上上下下。
10.
To disembark from an airplane.
离机，下机从飞机上下来
11.
relating to or determined by or in context.
涉及上下文的，取决于上下文的，或在上下文内的。
12.
Of, involving, or depending on a context.
上下文上下文的、涉及上下文的或取决于上下文的
13.
Recommended for ages three and up) Lacing up a graffie with your thread!!!
适合3岁或以上)向上、向下、向上、向下……!
14.
It snowed off and on all morning.
整个早上雪下下停停。
15.
Prices are rising, falling, going up, going down, shooting up, plummeting, etc.
物价在上涨、 下跌、 上升、 下落、 猛然上涨、 骤然下跌等.
16.
Price is rising, falling, going up, going down, shooting up, plummeting, etc
物价在上涨、下跌、上升、下落、猛然上涨、骤然下跌等
17.
Price be rising , falling , go up , go down , shooting up , plummet , etc
物价在上涨、 下跌、 上升、 下落、 猛然上涨、 骤然下跌等
18.
the upper [middle, lower] region of the air
大气的上[中，下]层