New Words:

accidental [.æksi'dentl] adj. 意外的, 偶然的
accidentally [.æksi'dentəli] adv. 偶然地, 意外地

Sample Sentences:

Breaking the vase was purely accidental; she did not mean to do it.
I didn't think our meeting was accidental ─ he must have known I would be there.

Did he break it accidentally? No, on purpose.
As I turned around, I accidentally hit him in the face.

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