On his trip he confined himself to sightseeing and other -ties.

在中他只限于观一些无关痛痒的事。

The tourists went sightseeing in the suburbs of the city.

游客们游览了市郊。

We spent the afternoon sightseeing.

我们下午去观了。

It should be protected as natural history relic and make the most of its values on geognosy and sightseeing resource.

应将其作为自然历史遗迹及时加以保护，并在保护的基础上充分发挥其地学游资源价值。