Moonbows are rarer than rainbows.
月虹比彩虹更罕见。
Programs using yacc, but not lex, are rarer.
使用yacc而不使用lex的程序比较罕见。
But the regulations do not cover rarer forms of E. coli.
然而，这些条例没有将大肠杆菌的一些罕见种类纳入监管范围。
Some of the rarer kinds of snake go for up to? 10,000 each.
一些较为罕见的蛇类的售价可高达10000欧元一条。
Financing was hard to scare up, and deals were smaller and rarer.
融资难，成交难，交易规模小。
These, mercifully, have grown much rarer in Egypt in recent years.
幸好，近年来类似事件在埃及很少发生了。
Latin will be even rarer-and forget about adding Mandarin this year.
拉丁文课会更加罕见——更别提今年会增加中文课了。
The remaining 75% is almost certainly governed by rarer genetic variations.
剩下的75%几乎由更为少见的基因变异所控制。
That is also true in a rarer form of human AIDS caused by a virus called HIV-2.
这也真实地反映在另一种罕见的人类艾滋病上，这种艾滋病是由HIV - 2型病毒而引发的。
That means traditional tie-ups will become rarer and exotic unions more common.
这就意味着传统的党间合作将越来越少，而新奇的联盟将更加普遍。
The most creative people imitate rarer, more brilliant sources and cover their tracks.
最有创意的人模仿罕见的、更加优秀的资源，然后掩盖其模仿的痕迹。
Centenarians used to be rarer than hens' teeth; now America alone has 100,000 of them.
过去，百岁老人就像母鸡的牙齿一样罕见，如今美国已经拥有十万名百岁老人。
The great thing about getting older is that this sort of public failure gets rarer too.
年龄增长的一个好处，就是这种当众失败的情况越来越少见。
Centenarians used to be rarer than hens' teeth; now America alone has 100, 000 of them.
过去，百岁老人就像母鸡的牙齿一样罕见，如今美国已经拥有十万名百岁老人。
Non-radioactive carbon comes in two forms: 12C and the heavier (and much rarer form) 13C.
非放射性碳以两种形式存在：12C还有较重（并且更罕见）的13C。
Oil spills should become rarer after next year, when all single-hulled ships will be banned.
等到下一年，在所有的单片轮船被禁止航行以后，燃油泄漏的发生应该能得到减少。
It is rare for the human race to make a billion of anything, still rarer for any one company.
对于人类来说，任何东西要想造出10亿个都是是非常罕见的，对任何一家公司来说就更罕见了。
It is rarer still for them to be joined by a survivor of the terrorist attacks on London in 2005.
更令人不可思议的是与他们坐在一起的还有2005年伦敦袭击事件的幸存者。
The boats are rarer sights today, as tourists increasingly opt for the faster, fancier cruise ships.
据说当时有成千上万的帆船在尼罗河上航行，而今天这种帆船已经非常罕见了，因为越来越多的游客选择了速度更快、装饰更豪华的游船。
The sample size is of course very small, with specimens rare and samples for experimentation rarer.
样本当然非常小，因为标本很少而能用来做实验的样本就更少了。
Daguerreotypes were usually portraits; the rarer views are much sought-after and are more expensive.
达盖尔照相术通常用来拍人像，拍风景的很少，也就更吃香，更是昂贵。
This may, in part, be because large spills have grown rarer as tanker technology, too, has improved.
在某种程度上，这可能是因为随着油轮建造水平的不断提高，大规模的漏油事件已越来越罕见。
Some species of snail have shells that spiral out in an anticlockwise direction, but it is much rarer.
有些种类的蜗牛有着从里到外逆时针的螺壳，不过这少见的多。
But there are others (rarer, to be sure) in which the character considers natural what happens to him.
也有些作品(确切的说，是极少的作品)，其人物认为发生在他身上的事情是极为自然地。
There is something that is much more scarce, something rarer than ability. It is the ability to recognize.
有的东西比才能稀罕得多，珍贵得多，这就是识别的能力。
Third, because corporate networks were rare and Internet use even rarer, the PC had to be self-sufficient.
第三，由于公司网络稀缺，互联网用户则更是罕见，PC必须自给自足。
Third, because corporate networks were rare and Internet use even rarer, the PC had to be self-sufficient.
第三，由于公司网络稀缺，互联网用户则更是罕见，PC必须自给自足。
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