Even though those efforts gave a sense of asynchronous invocations, they couldn't provide full and real functionality.

尽管那些努力有点异步调用的感觉，但它们无法提供完整和真正的功能。

youdao

When you're going to make something asynchronous it generally makes sense to make everything asynchronous (or nothing).

当你要做一些异步通常是道理全部异步的(或没有)。

youdao