工业机器人在油井周围的海床上作业时需要强大的光源，但即便如此，光线也只能穿出几百米远，更远处浓重的黑暗无情的吞噬着一切。
The industry robots working on the seabed around the wellhead need powerful lights. Even then, the rays go only so far.
但对于七年来华尔街最黑暗的一周来说，它来得太迟了，随着道琼斯工业平均指数下跌157点，跌至10325点，本周结束前又添了一个新伤疤。
But it came too late to prevent the worst week on Wall Street for seven years which ended with a fresh slide in stocks as the Dow Jones Industrial Average dropped by 157 points to 10, 325.
工业机器人在油井周围的海床上作业时需要强大的光源，但即便如此，光线也只能穿出几百米远，更远处浓重的黑暗无情的吞噬着一切。
The industry robots working on the seabed around the wellhead need powerful lights. Even then, the rays go only so far. Gloom quickly reasserts itself.
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