The first indication is that Tuesday afternoon's crash occurred after the metro system staff had switched to manual scheduling following a signal failure.

暗示星期二下午这场事故发生的第一个信号就是，地铁系统员工在信号指示失败后立刻转为手动操作。

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The crash happened while controllers were running operations using a manual system following an equipment failure, Shanghai Shentong Metro Group Co. said in a statement.

碰撞发生于因信号设备故障采用人工调度的时段，上海申通地铁有限公司在一份声明中称。

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Manual compaction of the mail database on the server adjusts its size to move it under the quota. You can do this manual compaction by completing the following steps.

手动压缩服务器上的邮件数据库能调整它占用空间的大小，使之降低到限额之下。

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The line, in the Penzing district of western Vienna, had been put under manual control following a technical defect, a spokeswoman for Austrian railways said.

BBC: Austrian trains in head-on crash

However, following the manual is usually a good bet.

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But Bradley has no appetite for following any script from the manual of conventional wisdom.

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