That is to say, when humans evolved without a particular switch, the absence of that switch allowed the brain to grow further.

也就是说，人类在进化中丢弃了这个特殊的开关，而这个缺失的开关让大脑能发育更高级。

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Preschool children draw all parts of face and body already accurately, without forgetting details. Absence of any part of body guards.

学龄前的儿童画脸和身体部位已经非常准确，不会忘记画细节和缺少身体的任何防卫部分，画长长的手对这个孩子来说是害怕受到惩罚。

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The NameNode detects this condition by the absence of a Heartbeat message. The NameNode marks DataNodes without recent Heartbeats as dead and does not forward any new IO requests to them.

Namenode通过心跳包的缺失检测到这一情况，并将这些Datanode标记为dead，不会将新的IO请求发给它们。

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Even without the absence from the market of Libyan petroleum, the situation seems dire.

FORBES: Growing World Automobile Population Threatens Petroleum Balance

And because of high rates of attrition (casualties and retirement, but mainly protracted absence without leave), just maintaining those numbers requires constant effort.

ECONOMIST: The war in Afghanistan

Reihana's absence left Northampton without a recognised goalkicker - he is unlikely to resume goalkicking against Biarritz because of a problem with his hamstring tendon - and his replacement, Carlos Spencer, has been frustratingly erratic.

BBC: Saints on the brink