Because I'm building a class myself, I need to explicitly create the default constructor.

因为我自己正在构建一个类，所以我需要显式地创建默认构造函数。

youdao

A good analogy for a constructor method is a building contractor, who takes the blueprints for your house and builds it.

构造函数方法好比建筑承包人，它利用房子的设计图建房子。

youdao

Another way of building an array in a single operation is by using a constructor by query, which creates an array with the values returned by a single-column sub-select, as shown in the listing below.

在单一操作中构建阵列的另一种方式是使用通过查询的构造函数，其创建具有由单列子选择返回的值的阵列，如以下清单所示。

youdao