在峡谷上建一座桥是不切实际的。

Building a bridge across the canyon is impracticable.

这个计划听起来不错，但实际上是不切实际的。

This plan sounds good, but it is actually impracticable.

由于大雪，开车上山是不切实际的。

Due to the heavy snow, driving to the mountain is impracticable.

期望每个人在这个问题上达成一致是不切实际的。

Expecting everyone to agree on the issue is impracticable.

在一周内环游世界的计划是不切实际的。

The plan to travel around the world in a week is impracticable.

在这种天气下进行户外活动是不切实际的。

It is impracticable to hold outdoor activities in this weather.

由于预算限制，这个项目变得不切实际了。

Due to budget constraints, this project has become impracticable.

他的建议虽然有趣，但在现实中是不切实际的。

His suggestion is interesting, but it is impracticable in reality.

在短时间内实施如此复杂的系统是不切实际的。

Implementing such a complex system in a short time is impracticable.

这个想法听起来很棒，但在短时间内实现是不切实际的。

This idea sounds great, but it is impracticable to achieve it in a short time.