Listing 5 adds a trail and a location to the database, managed with a foreign key pointing from the location_id column in trails to the id column in locations.

清单5向数据库添加了一条赛道和一个地点，由从trails中的location_id列指向locations中的id列的外键管理。

youdao

Get up and join in the activities by pushing a jogging stroller, hitting the hiking trails, climbing the jungle gym or swimming in the lake.

起来，加入到活动中去，推着婴儿车慢跑，到健行步道，爬爬攀登架，或者到湖里游泳。

youdao

So far, I've changed the way Streamlined presents a relationship in the Trails view.

迄今为止，我已经修改了Streamlined在Trails视图中表示关系的方法。

youdao

You can see many other ruins by following the more than one hundred kilometers of trails in Bandelier.

VOA: special.2010.07.05

Both trails up the mountain ended near Lake Bennett in British Columbia.

VOA: special.2009.02.11

The strategy has had some success and,although he still trails Komorowski in opinion polls, one recent poll narrowed Komorowski's lead to as little as two points.

VOA: standard.2010.06.17

There are hundreds of miles of authorized trails in the Tahoe Basin, and if you factor in unofficial trails, the number of possible routes becomes nearly endless.

BBC: Lost in paradise

The huge number of medicines that turn out to cause liver problems, including withdrawn drugs like Baycol from Bayer or Rezulin from Pfizer, were screened first in cells, then in animals before they were tested in large clinical trails in people.

FORBES: Magazine Article

The huge number of medicines that turn out to cause liver problems, including withdrawn drugs like Baycol from Bayer (nyse: BAY - news - people ) or Rezulin from Pfizer, were screened first in cells, then in animals before they were tested in large clinical trails in people.

FORBES: Cell News Opens Door To Drug Discovery