Now, the thing you have to remember about " set" , this is called an ambitransitive verb.

现在，你必须记住关于“set”的事情，这叫做双及物动词。

Some are called ambitransitive, means in some situations, they take an object; in some situations, they don't take an object.

有些被称为双向传递， 意思是在某些情况下， 他们接受一个对象；在某些情况下， 他们不拿东西。

You don't need to know that word " ambitransitive" , but it means it can be a transitive or an intransitive, meaning it can take an object or not take an object.

你不需要知道“双及物”这个词，但它意味着它可以是及物物或不及物物， 这意味着它可以带一个宾语或不带一个宾语。