through train

基本解释

What has been delayed is the [through train] and not QDII.
被推迟的是（港股直通车）而非QDII。
We have many trains going to Beijing, the local train, the fast train, the through train, the express train, and the tourist train.
我们有很多趟去北京的列车，慢车、普快、直快、特快和旅游列车。
edu.sina.com.cn
It's through train, you don't have to change anywhere.(＝you don't have to change trains anywhere)
这是一超支达车，你不需要在任何地方换车。

The first troop train from the North passed through Baltimore,Maryland, without incident.
Another example is at the very opening of the book: The train was racing through treetops that fell away at intervals and showed the sun standing very red on the edge of the farthest woods.
在书的最开头还有一个例子：,“在树林中，火车疾驰，若隐若现,时不时地露出远方树林,边缘的火红的夕阳,一旁是弯弯曲曲。
耶鲁公开课 - 1945年后的美国小说课程节选
You need to train a pig and you need to do so through operant conditioning.
你需要运用操作性条件作用来训练一头猪。
耶鲁公开课 - 心理学导论课程节选