What a slow train this is!

这列火车开得多慢呀！

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It is a slow train, not an express.

这是一列慢画，不是快车。

youdao

Above the crowd I hear the clang of a crossing signal as a slow train rolls along the tracks.

越过人群，我听到一辆慢车驶过道口时的的信号声。

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It was raining as I got off the train in Nashville, Tennessee - a slow, gray rain.

VOA: special.2009.01.17

Day, as the nation's first black president was being sworn in for a second time, was a reminder to all of us that at times equality can feel like a slow train coming ... but we cannot grow weary because it is coming.

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When I started doing these videos last November, I said Europe is a slow motion train wreck.

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This system, Positive Train Control (PTC), is intended to stop or slow a train automatically if a driver goes too fast or passes a red signal.

ECONOMIST: American railways