This would mean stronger masseter and temporalis muscles — the muscles in the face involved in chewing.
这就意味着他们有着更强壮的咬肌和颞肌,也就是参与咀嚼动作的面部肌肉。
英语百科
Temporal muscle
(重定向自Temporalis)
The temporal muscle, also known as the temporalis, is one of the muscles of mastication. It is a broad, fan-shaped muscle on each side of the head that fills the temporal fossa, superior to the zygomatic arch so it covers much of the temporal bone.