来头不小
It has quite a big background.
以上为机器翻译结果，长、整句建议使用 人工翻译 。
他怀里揣着从华盛顿开出的来头不小的证明书，去旅行。
He had travelled with good credentials from Washington.
youdao
基米的衣着和举止使店员感到这人来头不小，因此很乐意为这个年轻人提供他所需要的情况。
The clerk was impressed by the clothes and manner of Jimmy and he was ready to give the young man any information he desired.
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