As a language expert with a deep understanding of idiomatic expressions, I can provide you with the meaning of the phrase "to be out in left field."

The phrase "to be out in left field" is an idiom in American English that is used to describe someone who is not thinking clearly, is confused, or has unusual or unconventional ideas. It can also refer to someone who is not paying attention or is not in sync with what is happening around them. The expression is thought to have originated from baseball, where the left field is often the farthest position from the action, implying that the person is distant from the main focus or activity.

Here is the translation of the explanation into Chinese:

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"Out of left field" is American slang meaning "unexpectedly", "odd" or "strange". The phrase came from baseball terminology referring to the area covered by the left fielder who has the farthest throw to first base.read more >>