He clammed up when I asked him who else was involved.
当我问他还有谁参与此事时，他咬紧牙关，不肯交代。
He promised not to tell anyone the secret, so when people asked him about the thing, he just clammed up.
他保证不会告诉任何人这个秘密，所以只要有人问到这件事，他就闭嘴。
He promised not to tell anyone the secret, so when people asked him about the thing, he just clammed up.
他保证不会告诉任何人这个秘密，所以只要有人问到这件事，他就闭嘴。
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