A livestock vaccine against the disease exists but is rarely used.
有一种家畜疫苗可以预防这种疾病，但它很少被使用。
The College Board announced that the new SAT will no longer test students on rarely used words.
大学理事会宣布，新的SAT 考试将不再测试那些很少使用的单词。
The dekametre is a very rarely used unit of length.
公丈是一个很少使用的长度单位。
Although the "ne" in negatives should always be written, it is very rarely used in informal speech.
尽管“ne”在否定式中应总被书写，在非正式口语中却很少被用到。
Traffic lights are in place, but rarely used.
路上有红绿灯，但很少使用。
The rarely used element creates a table footer.
很少用到元素，它可以创建表页脚。
An older name, nocturnal myoclonus, is rarely used anymore.
它的旧名字夜间肌肉抽动已经很少使用了。
Figure 1. Most features implemented are never or rarely used.
图1.绝大多数实现的特性从来没有或者很少被使用到。
Psychoanalysis is rarely used in the United States anymore.
心理分析很少使用在美国了。
This option is turned off by default since it is rarely used.
由于该选项很少使用，所以默认关闭了。
So the second option is rarely used in real-world system implementations.
所以在实际的系统实现中，第二个选项很少使用。
CarreraGT USES a 10-cylinder engine, which is rarely used except for sports cars.
CarreraGT使用10缸发动机，除了跑车之外很少用于其他车型。
1 Further, 45% of features implemented are never used, and 19% are rarely used.
1进一步来说，所实现的特性中有45%从来没用过，19%很少用到。
The easiest yet most rarely used process of change is the manifestation process.
最容易但却被最少用到的变化就是显现的过程。
On the other hand, xargs is rarely used except with other utilities, most often find.
另一方面，xargs除了与其他实用程序(最常见的是find)配合使用外，很少单独使用。
Unfortunately, anycast does not fit well with TCP and is rarely used in that scenario.
美中不足，Anycast与TCP协议适应的不是很好，所以很少应用在那些方案中。
You handle the rarely used element just like the element. Here's the simple XSLT template
处理极少使用的元素和处理 元素相似。
Why? Because the music world is fan-oriented; in fact the word customer is rarely used.
何解？因为音乐是“粉丝导向型”世界，事实上“客户”一词在音乐界很少见。
Experience shows that the form is rarely used if there is a simpler interface available.
经验显示，如果有可用的更简单的界面，这种表单很少使用。
Because atime is rarely used by systems administrators, disabling it frees up some disk time.
因为系统管理员很少使用atime，禁用它可以减少磁盘访问时间。
These features are mostly ones that led to poor programming practices or were rarely used.
这些特性多是些会导致不良编程习惯的或者很少使用的。
We have rarely used them for production code, even after four years of usage in experimental code.
我们甚至在试验代码中用了四年之后还很少在生产代码中使用它们。
Although extremely important in auction theory, in practice Vickrey auctions are rarely used.
尽管这种方式在拍卖理论中占据重要地位，但在实际中，维克瑞拍卖方式却很少被使用。
Since this replacement proxy capability is rarely used, the related proxy APIs are not covered here.
因为这种代理能力的替代很少被用到，因此相应的APIs也很少提到。
Although the ne in negatives should always be written, it is very rarely used in informal speech.
尽管ne在否定式中应时时被书写，在非正式口语中却很少被用到。
But it was rarely used, most often being granted only as a special favour to friends by those in power.
但当时很少使用，仅仅作为一种对朋友的特殊优惠。
What it does have is useful social lubricants such as please (absent or rarely used in some other languages).
这种形式的运用是有益的社交调适剂，例如“请”(在其他语言中不使用或很少使用)。
What it does have is useful social lubricants such as please (absent or rarely used in some other languages).
这种形式的运用是有益的社交调适剂，例如“请”(在其他语言中不使用或很少使用)。
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