首先，找一个杯口大小刚好能将洋葱卡在杯口上的玻璃杯子。

首先，找一个杯口大小刚好能将洋葱卡在杯口上的玻璃杯子。

Results (English) 1:

First, find a cup size onions can just stuck in the glass cup child.

Results (English) 2:

First, find a glass just the size of the cup that can hold the onion on the mouth.

Results (English) 3:

First of all, find a glass cup with a mouth size just enough to hold the onion on the mouth.