升降的英文：
elevation and subsidencei
fluctuation

参考例句：

Antenna elevating subsiding machine
天线升降机构

An airplane built to fly vertically as well as forward.
垂直升降飞机一种既可向前飞亦可垂直飞行的飞机。

Permissible limit
(价格升降的)最大限度

Coil car
带卷升降运输机

A helicopter landing platform
直升机升降平台

The up-down gear turns in the proper direction to raise the seat.
升降齿轮转到适当的方位,升高座椅

permissible limit
(价格升降的)最大限度，允许的限度

The lift grinds in the shaft.
电梯在升降井里嘎嘎响着。

Window cleaners are pulled up and down tall buildings on cradles.
窗户清洁工乘坐能升降的吊篮清洗高层建筑物的窗子。

You can double the length, width, or both of standard lift tables by using tandems.
使用串联升降台，即在通用标准升降台上使长度、度加倍或者两者同时加倍。

elevation是什么意思：
n. 提拔；高度，海拔；高地；立面图

That is an express elevator.
那是一个高速电梯。

building elevation
建筑立面

elevation detail
立面细部

fluctuation是什么意思：
n. 波动，涨落，起伏

Fluctuations are spatial and temporal in character.
这种波动的特点是空间性和瞬时性的。

There are fluctuations in the state of his health.
他的健康状况时好时坏。

It is apparent that rapidly fluctuating temperatures are not indicated.
温度急剧地增减不能被指示出来是显而易见的。