万一...

Routing tables are continuously built and rebuilt by intelligent discovery protocols, such as Routing Information Protocol or Open Shortest Path First. Each router/'s routing table shows the best route to the destination address; for addresses that may be several hops away, it shows the best next－hop router.

万一目的地的MAC地址没有出现在ARP高速缓存中，路由器必须向与包的目的IP地址有关的子网广播一个ARP请求，拥有此IP地址的端站就作出响应，把MAC地址发送回去，路由器因此更新高速缓存，把新的MAC地址装进包的报头并发送该包。

Routing tables are continuously built and rebuilt by intelligent discovery protocols, such as Routing Information Protocol or Open Shortest Path First. Each router/'s routing table shows the best route to the destination address; for addresses that may be several hops away, it shows the best next－hop router.疯狂英语学习网 e37.com.cn

万一目的地的MAC地址没有出现在ARP高速缓存中，路由器必须向与包的目的IP地址有关的子网广播一个ARP请求，拥有此IP地址的端站就作出响应，把MAC地址发送回去，路由器因此更新高速缓存，把新的MAC地址装进包的报头并发送该包。

For a monthly fee of about $8, the insurance will guarantee you a quick, free replacement if you lose the phone--and it will get you up and running if you do something silly like run over the handset with a motorcycle.

只要每个月花约8美元，万一丢了手机，保险公司能保证你能迅速得到一部免费的更换手机——如果你干了什么傻事，比如开着摩托车碾过手机，XXXX。

We promise an unconditional taking back if there is any quality variance between the sample and the dispatch.

万一样品的质量与发货的质量不符，我们会保证无条件退货。

Should you ever find information you want to save on your own computer ,you can download it .

万一你发现了想要储存到计算机上的信息，你就可以下载下来。

Should this come true,the sea will swallow up millions of homes and the world will be flooded with"cimate refugees"looking for somewhere to live.

万一这变为现实，海水将会吞没几百万个家庭，这个世界将被水所淹没，寻找"气候避难地"来生存。

CNN security analyst Mike Brooks says that means you should always be asking yourself one question:"What if something happens here?"

CNN安全分析员Mike Brooks表示，这是指你应该一直问自己一个问题："如果万一这里发生了什么事情怎么办？"

If he should come tomorrow, he can help us to see into the matter.

万一他明天来，他就能帮助我们调查那件事。

But in our trade it is impossible to be without means of self-defence in case of emergency, and I kept a loaded revolver.

但是，干我们这一行的人是不可能不防备万一的，必须具备自我保卫的能力，所以我买下了这把可以装子弹的手枪。

I have a small income from share , which is my sheet anchor if my business shall fail.

我有点股票收入，万一生意赔了还有个退步。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。