查询功能是产品的一个便捷特性，但它不受高端数据库中所有高级查询优化器的支持。
The query functionality is a valid convenience feature of the product, but it is not backed by all the sophisticated query optimizers found in top-end databases.
这类应用的特点是存在大量活跃堆数据和线程级别的并发，并且往往运行在高端多核处理器上。
These sorts of applications are characterized by large amounts of live heap data and considerable thread-level parallelism, and are often run on high-end multi-core processors.
据销售数据来看，过去35年里，高端弦乐器的回报率远远超过了美国股市的表现(如图)。
According to sales data, during the past 35 years the returns for high-end stringed instruments have vastly exceeded the performance of American stocks (see chart).
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