The basic rule for this checksum is that each of the first nine digits is multiplied by its position (that is, the first digit times one, the second digit times two, and so on).

这个校验和的基本规则是前九位数的每一位乘上它的位置(即第一位数乘上1，第二位数乘上2，依次类推)。

youdao

Turns out the rule holds: he'd had nine years of intensive study.

10年定律是适用的：他此前进行过9年的集中强化学习。

youdao

What about Bobby Fischer, who became a chess grandmaster at 16? Turns out the rule holds: he'd had nine years of intensive study.

那么16岁成为象棋大师的博比·费希尔怎样解释呢？ 10年定律是适用的：他此前进行过9年的集中强化学习。

youdao

He is replacing Gloria Macapagal Arroyo, whose nine-year rule saw failed power grabs and opposition impeachment bids against her because of allegations of vote-rigging, corruption and rights abuses.

VOA: standard.2010.06.30

For nine hours on December 1st, witnesses held forth on the threat to the rule of law posed by false testimony.

ECONOMIST: Impeachment

Now Mr Chaudhry is out to settle scores with nine senior judges accused of contempt of court for accepting jobs late in Mr Musharraf's rule.

ECONOMIST: Pakistan's populist judges