You can define these new types using the existing ones as a base.

可以使用现有的作为基础来定义这些新类型。

youdao

It is also possible to define a custom field validator if none of the existing ones fit your needs.

如果没有符合要求的验证程序，也可以定义一个自定义字段验证程序。

youdao

In version 6.2, there are several new mediation primitives, as well as improvements to many of the existing ones.

在6.2版本中，存在若干新的中介原语以及对许多现有中介原语的改进。

youdao

They say the government should require drug makers to state, in their labeling information, how new medications compare with existing ones.

VOA: special.2009.08.14

Condom told French radio that the mantra of this year's Paris show would likely be to maintain existing orders rather than to secure new ones.

VOA: standard.2009.06.16

They were strengthened last year, after the existing ones were stormed by hundreds of would-be immigrants.

ECONOMIST: Spain and immigration: Still they come | The

Nor is it clear how the transplanted immune cells stop the existing ones from attacking the new organ.

ECONOMIST: Organ transplants

Ryder says, diplomatically, that building its own school is no reflection on the existing ones in the district.

FORBES: Build it and they will come