keeping nothing back
毫无保留
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Keeping his eyes down, Zuckerberg said nothing, got back into his car, and drove off, unscathed.
扎克伯格不再看他，一言不发地走回车里，驾车离去。居然毫发无伤。
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