If you can't observe in the shade of trees or walls, you might rig a tarpaulin to shield your site.

如果你无法在树或墙的影子下观测，你可以用防水布搭建一个观测场。

youdao

If you can't observe in the shade of trees or walls, you might rig a tarpaulin to shield your site.

如果你无法在树或墙的影子下观测，你可以用防水布搭建一个观测场。

youdao