单词	Johnny-on-the-spot
释义	Johnny-on-the-spotˌJohnny-on-the-ˈspot noun [singular] informal someone who immediately offers to help, takes an opportunity etc
随便看	accuser accusing accusingly accustom accustomed AC/DC ace acerbic acerbity acetate acetic acid acetone acetylene ache achievable achieve achievement achiever Achilles Achilles' heel Achilles tendon achoo achy acid acid-free

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