as long as it's small and finite, will lead to some small infinite errors in the formula, but remember it's got to be in the end made to be vanishingly small.

只要它只是有限小,就会在公式中引起无限小的误差,但请记住,Δt最后变得难以察觉地小

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But the 19-year-old made a couple of errors towards the end of the match and the Danes capitalised to win.

BBC: Defeat by Denmark leaves British women all but out

At 1-1, Murray, bowing to relentless pressure from the other end, threw in two errors off the ground followed by a double fault to concede the break.

BBC: Brutal Nadal sweeps aside Murray

Verdasco proved to be a tougher opponent this time around, with a customary powerful serve and some fine shots, but the Spaniard's errors towards the end of the first set proved costly.

BBC: Murray maintains winning sequence