He balanced the glass precariously on the arm of his chair.
他把杯子放在椅子的扶手上，随时可能摔下。
The television was precariously balanced on top of a pile of books.
电视机摆在一堆书上面好危险。
She is shown here standing precariously on a cliff.
照片上的她摇摇欲坠地站在悬崖的边上。
He sat precariously on the roof of the cabin.
他不稳地坐在小屋的屋顶上。
He sat precariously on the roof of the cabin.
他不稳地坐在小屋的屋顶上。
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