zero

名词 zero:

1. a quantity of no importance
   同义词：nothing, nil, nix, nada, null, aught, cipher, cypher, goose egg, naught, zilch, zip, zippo
2. a mathematical element that when added to another number yields the same number
   同义词：0, nought, cipher, cypher
3. the quantity that registers a reading of zero on a scale
   同义词：zero point

动词 zero:

1. adjust (an instrument or device) to zero value
2. adjust (as by firing under test conditions) the zero of (a gun)
   同义词：zero in

形容词 zero:

1. indicating the absence of any or all units under consideration
   同义词：0
2. indicating an initial point or origin
3. of or relating to the null set (a set with no members)
4. having no measurable or otherwise determinable value

1. The probability of a peace agreement being reached is zero.
   达成和平协定的概率是零。
2. His hope was reduced to zero.
   他的希望化为乌有。
3. It was five below zero last night.
   昨夜温度是零下五度。

ze.ro

n.（名词）
【复数】 ze.ros 或 ze.roes 缩写 z.
The numerical symbol 0; a cipher.
0：数字符号0；零
Mathematics
【数学】
An element of a set that when added to any other element in the set produces a sum identical with the element to which it is added.
零元素：集合中的一个元素，当它加上集合中的任何一个元素时，得到的数值等于被加元素值
A cardinal number indicating the absence of any or all units under consideration.
零：基数，表示在考虑下不存在的任一或所有的单位
An ordinal number indicating an initial point or origin.
零：序数中表示最初的点或原点
An argument at which the value of a function vanishes.
（坐标的）起点：函数自变量的值等于零
The temperature indicated by the numeral 0 on a thermometer.
零度：温度计上数字0所示的温度
A sight setting that enables a firearm to shoot on target.
瞄准仪：一种能使火器射中靶子的、用来调整准度的仪器
Informal One having no influence or importance; a nonentity:
【非正式用语】 无足轻重的人：没有影响力或无足轻重的人；不足取的人：
例句：
a manager who was a total zero.
一个等于废物的经理

The lowest point:
最低点：
例句：
His prospects were approaching zero.
他几乎没有希望

A zero-coupon bond.
无收益但在赎回价格之下的债券
Informal Nothing; nil:
【非正式用语】 没有；全无：
例句：
Today I accomplished zero.
今天我一事无成

adj.（形容词）
Of, relating to, or being zero.
零的：零的、与零有关的或成为零的

Having no measurable or otherwise determinable value.
无价值的：没有重大的或其它可肯定的价值的
Informal Absent, inoperative, or irrelevant in specified circumstances:
【非正式用语】 不存在的：在特定环境中不存在的、无效的、无意义的：
例句：
.The town has . . . practically no opportunities for amusement, zero culture.(Robert M. Adams)
.这座城市几乎没有机会娱乐，也没有文化.(罗伯特M.亚当斯)

Meteorology
【气象学】
Designating a ceiling not more than ' meters (52 feet) high.
零度云高的：指云高不超过'米(52英尺）
Limited in horizontal visibility to no more than 55 meters (80 feet).
零视度的：水平能见度在55米(80英尺）以内的
v.tr.（及物动词）
ze.roed,ze.ro.ing,ze.roes
To adjust (an instrument or a device) to zero value.
把…调到零点：调整（仪器或设备）到零点

<常用词组>zero in
To aim or concentrate firepower on an exact target location.
把…瞄准目标：瞄准或集中火力在正确的目标上
To adjust the aim or sight of by repeated firings.
调整归零：通过重复射击调整目标或视角
To converge intently; close in:
专心注意，迫近：
例句：
The children zeroed in on the display of toys in the store window.
孩子们的注意力都集中在商店橱窗里陈列的玩具上

来源：
Italian
意大利语
from alteration of Medieval Latin zephirum
源自 中世纪拉丁语 zephirum的变化
from Arabic ìifr [nothing, cipher]
源自 阿拉伯语 ìifr [没有，零]