They are unscalable and fixed in size.

它们不能够进行扩展并且是固定大小的。

The overhead of this request can make a system unscalable if the validating parser does not cache the schema definitions.

如果确认解析器没有对模式定义进行高速缓存，这种请求的开销会使系统失去可扩展性。

It's hard to program safely; programs that manipulate threads are prone to inconsistent data, deadlocks, unscalable locking, and inverted priorities.

要用线程安全地编写程序是很难的；需要操纵线程的程序很容易引起不一致的数据、死锁、不可伸缩的锁定以及倒置的优先级等问题。

The unscalable case expression and the unreusable reasoning process lead to the development and the maintenance of the systems difficult and costly.

案例表达不具有扩展性、推理过程不具有重用性，使得开发和维护代价十分昂贵。