Use single-line comments whenever possible.

尽量使用单行注释。

youdao

Then mark the corresponding letter on Answer Sheet 1 with a single line through the center.

然后在答题卡1对应字母中处划横线。

youdao

You should decide on the best choice and mark the corresponding letter on Answer Sheet 2 with a single line through the centre.

选择最恰当的答案，并在答题卡2相应字母中心处画一条线。

youdao

Although the single-line method may be faster, Mr. Hammack says customers generally prefer to "jockey for position" in separate lines.

WSJ: Find the Best Checkout Line

But ordering is done near the front door, with a single-file line that moves right along.

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In a research project conducted during last year's holiday season and posted on YouTube, Bill Hammack, a professor of chemical and biomolecular engineering at the University of Illinois at Urbana-Champaign, concluded that a single-file line leading to three cashiers is about three times faster than having a separate line for each cashier.

WSJ: Find the Best Checkout Line