However, when they are asked to walk into an obstacle or off the end of a table, for example, the robots politely decline to do so.

然而，如果命令他们走入障碍物或者走向桌子的边缘时，机器人会礼貌地拒绝。

youdao

There are a lot of the environmental problems in course of groundwater exploitation: underground water table has sustained to decline;

河北平原是我国严重缺水地区 ，但在地下水开发过程中 ，引起了多种环境问题 ，如地下水位持续下降 ；

youdao

There are a lot of the environmental problems in course of groundwater exploitation: underground water table has sustained to decline;

河北平原是我国严重缺水地区 ，但在地下水开发过程中 ，引起了多种环境问题 ，如地下水位持续下降 ；

youdao