在那面古老的灰色墙壁上，他又开始写上了和先前一样强烈的警示人的醒目字句，看上去既奇怪又不同寻常，这面墙以前从来没有让人写上什么，现在被写上了字，它仿佛有些痛苦。

The old gray wall began to advertise a similar fiery lettering to the first, with a strange and unwonted mien, as if distressed at duties it had never before been called upon to perform.

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然后，在该请求完成以前，说服者提高价码，并说明需要帮助的事比先前描述的事更大。

Then, before the favor is executed, the persuader ups the ante and explains that the favor is actually larger than previously described.

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先前的技能至少带来一个额外的错误：他没有在将车交到客户手中以前做最后检查。

The previous tech made at least one additional mistake: he failed to do a final check of his work before releasing the car to the customer.

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