如果内部表没有索引，那么数据库服务器就会将在表上构建索引的成本与连续扫描的成本进行比较，然后选择成本最低的那一种方法。

If the inner table does not have an index, the database server will compare the cost of building an index on the table to the cost of a sequential scan, and will choose the one with the least cost.

youdao

论文比较详细的讨论了一套基于定电位电解传感器的工业烟道气二氧化硫连续在线监测系统。

A continuous online industrial emitted exhaust monitor based on the fixed electric potential electro-analysis sulfur dioxide sensor was presented detailedly.

youdao

对于特定人连续语音识别系统和非特定人连接词识别系统，在使用不同的特征矢量时，不同编码器产生的识别效果有比较大的差异。

Using different feature vectors, the effect of the vocoders differs on speaker dependent continuous speech recognition and speaker independent connected digits recognition.

youdao