He pointed to a large perfect pearl the size of a small walnut that lay apart on a piece of chamois .
他指着一颗单独放在一块鹿皮上的大珠子，这珠子晶莹无瑕，有颗小核桃大小。
The Thymus gland: This is a small walnut sized gland which lies behind the breast bone.
胸腺：胸腺是一种像小核桃大小的腺体，分布于胸骨后侧。
The Thymus gland: This is a small walnut sized gland which lies behind the breast bone.
胸腺：胸腺是一种像小核桃大小的腺体，分布于胸骨后侧。
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