adj.中型的；中号的；中等尺寸的；中颗粒的

Even small fish can swallow seeds of moderate size. 既使小型的鱼类也可以吞食中型的种子。

It is a medium- size samsonite, and it's gray. 它是一个中型的灰色绅耐特皮箱。

Your shirt and mine are of the medium size. 你的衬衫和我的都是中号的。

One of my suitcases is large, and the other one is medium. 我的手提包，一只是大的，另一只是中号的。