And interestingly this expression is usually reflexive so the subject and the object are the same.

有趣，这种表达通常反身形式，所以主语和宾语相。

Sometimes we use a reflexive pronoun without " by" .

有时们用反身代词，不带by。

It isn't a reflexive verb in English.

它在英语中不反身动词。

A reflexive pronoun describes the subject of a sentence.

反身代词描述句子主语。

It's reflexive. So we don't need anything there.

它自反。因此们不需要任何东西。

It gets to the point where it's reflexive, automatic.

它达到了反射性、自动程度。

We've learned when to use reflexive pronouns and when not to.

们学会了什么时候用反身代词，什么时候不用。

But we don't use a reflexive pronoun with prepositions of place.

们不会把反身代词和表示地点介词连用。

That means the star will make a small circle — what's called reflexive motion.

这意味着恒星会转出一个小圆圈——这被称为自反运动。

This usage may have the same meaning as " by" reflexive pronoun.

这种用法可能与by加反身代词有相意思。

We use a reflexive pronoun in the first part of the sentence.

们在句子第一部分使用了反身代词。

Startle syndrome, also called hyperekplexia, is a rare disorder in people's reflexive reactions to surprise or agitation.

惊吓综合征，也被称为过度兴奋症，一种罕见疾病，人们对惊讶或激动反射性反应。

She'll need to use the reflexive pronoun " myself" .

她需要使用反身代词“myself”。

Although it has other meanings, when used with a reflexive pronoun, it means alone or without help.

它还有其他意思，当与反身代词连用时，它意思独自或没有帮助。

Reflexive pronouns refer back to the subject of a sentence or clause.

反身代词指代一个句子或从句中主语。

Okay, so we use a reflexive pronoun when it refers to the subject of a sentence or clause.

好，所以们用反身代词指代一个句子或从句主语。

So this is not a reciprocal action; this is a reflexive.

所以这不互惠行为；这反身。

We make this meaning with " by" followed with a reflexive pronoun, such as " myself" or " yourself" .

们用" by" 后接反身代词来表达这个意思，比如" 自己" 或" 你自己" 。

Humans are not limited to reflexive action.

人类并不局限于反身行动。

Another way is to measure the Doppler shift in a star's light due to reflexive motion as the planet orbits.

另一种方法测量恒星光线多普勒频移，这种频移由行星绕轨道运行时自反运动引起。