They have to set a limit to the expense of the trip.
他们不得不限制这趟旅行的费用。
We set a limit on the expenses of the trip.
我们规定了这次旅游的费用。
We set a limit to the expense of the trip.
我们规定了这次旅游的费用。
In my opinion, you had better set a limit to the expense of your trip.
在我看来，你们最好给这次旅行的费用定一个限度。
In my opinion, you had better set a limit to the expense of your trip.
在我看来，你们最好给这次旅行的费用定一个限度。
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