And tell them you want to go on the tour that goes down into the canyon.
跟他们说你要参加到峡谷里去的旅游团。
You had better wash those dirty clothes.
你该去把那些脏衣服洗一洗。
In the first place, any scientific study requires that there be no preferential weighting of one or another of the items in the series it selects for its consideration.