The sport's rules require that a race walker's knees stay straight through most of the leg swing and one foot remain in contact with the ground at all times.

这项运动的规则要求竞走运动员的膝盖在大部分的腿部摆动过程中保持笔直，一只脚始终与地面保持接触。

youdao

Mike:Well, these things happens, I know that. You just have to stay straight with me.

嗯,这是难免的,你只要直接告知我就可以了.

youdao

The coin in the middle of your hand will just drop straight down, so it'll stay under that hand.

因此在掌心的那枚硬币就会垂直落下，最后仍然会在那只手里。

youdao

The reason MPs are likely to stay on the straight and narrow is the fact that their claims will henceforward be published online.

ECONOMIST: Cleaning up Parliament

America worries that such generosity could weaken Mr Kim's incentive to stay on the nuclear straight and narrow.

ECONOMIST: The devil in the nuclear detail

Needing to win four straight games to stay alive in the playoffs, Celtics coach Doc Rivers talked to his team about the Red Sox and their comeback against the New York Yankees in the 2004 AL championship series.

WSJ: Knicks need to win on road to avoid Game 7