the all clear的意思|示意

All the footmarks are quite sharp and clear.

所有的足迹都很清楚明晰。

Ms Pisamai, a cassava farmer, is waiting for the all-clear to go home.

Pisamai女士是个农民，靠种木薯为生，她正等着警报解除后好回家。

Soon, all became clear: the stuffing machine operator had managed to fill the teddy bear stuffing machine hopper with car wheels.

不久，所有的一切都清楚了：装箱机的操作工把玩具车轮放入了泰迪熊装箱机的送料斗。

However, tracking data showed the debris would not come close enough to warrant an evacuation of the station, NASA said in a statement issued after the crew was given the all-clear signal.

然而，在空间站人员收到警报解除的信号之后，NASA发布了一份声明，称跟踪数据表明卫星碎片的距离不会接近到需要确保能进行空间站撤离的地步。

The crew was given the all-clear signal at 2:41 p.m., NASA said, less than two hours before the 4:21 p.m. estimate officials had given for when the debris was expected to pass by the station.

美国宇航局表示，预测人员估计太空碎片将于4点21分经过空间站，宇航员们在约两小时之前的2点41分收到警报解除信号。

To be clear, people can't keep away from all the risks in this way, but it's the best choice.

需要明确的是，人们不能以这种方式远离所有的风险，但这是最好的选择。