volatile

volatile

noun

1. a volatile substance
a substance that changes readily from solid or liquid to a vapor

e.g. it was heated to evaporate the volatiles

volatile

adj

1. tending to vary often or widely

e.g. volatile stocks
volatile emotions

2. marked by erratic changeableness in affections or attachments

e.g. fickle friends
a flirt's volatile affections

Synonym: fickle

3. liable to lead to sudden change or violence

e.g. an explosive issue
a volatile situation with troops and rioters eager for a confrontation

Synonym: explosive

4. evaporating readily at normal temperatures and pressures

e.g. volatile oils
volatile solvents

1. 易变的;动荡不定的;反复无常的
A situation that is volatile is likely to change suddenly and unexpectedly.

e.g. There have been riots before and the situation is volatile...
以前曾发生过暴乱，现在局势不太稳定。
e.g. The international oil markets have been highly volatile since the early 1970s...
从20世纪70年代初开始，国际石油市场就一直很不稳定。

2. （人）易变的，情绪无常性的
If someone is volatile, their mood often changes quickly.

e.g. He accompanied the volatile actress to Hollywood the following year...
第二年他陪着这位情绪无常的女演员去了好莱坞。
e.g. He has a volatile temper.
他脾气反复无常。

3. （液体等物质）易挥发的，易发散的
A volatile liquid or substance is one that will quickly change into a gas.

e.g. It's thought that the blast occurred when volatile chemicals exploded.
人们认为，易挥发的化学物质爆炸时产生了冲击波。

1. 挥发性：有两种主要的类型-{zh-cn:易失性;zh-tw:挥发性}-(Volatile)记忆体:指的是当电源供应中断后,记忆体所储存的资料便会消失,一般称之为[[随机存取记忆体]]([[RAM]]).

2.

2. 挥发性的：在高性能的示踪检波器(solid track detectors)的帮助下,宇宙中子研究也已展开,位乌克兰和德国科学家们鉴定了Galindez 岛上的200 种具挥发性的(volatile)有机物和群岛(Argentine Archipelago Islands)上的大地测量网.

3. 易失的：在典型的 PC 中,此内存是 易失的(volatile),也就是说,它需要有电源才能保存数据. 关闭 PC,内存就会被清空. 从另一个角度来说,当我们关闭一台 PC 后,它就只是一堆硬件组件,什么也做不了,直到它被重构(reprogrammed). 当启动机器时会发生重构;

4. 易变的：要注意在写DCACHE之前一定要禁止数据缓存(STATUS寄存器的DC位要置0) .如果 大量数据缓存要被设为失效,可以把相应存储区域声明为易变的(volatile) ,这样C编译器 nios-elf-gcc会使用PFXIO绕过缓存访问数据,从而避免了使缓存失效的操作.