the ornamental front of a woman\\\'s bodice or shirt
the front of man\\\'s dress shirt
a metal breastplate that was worn under a coat of mail
a large pad worn by a fencer to protect the chest
(zoology) the part of a turtle\\\'s shell forming its underside
造句
用作名詞(n.)
Tortoises seem to preferentially put the available calcium in the plastron. 龜們似乎更喜歡把可用的鈣質添加到他們的胸甲中。
Because the plastron has a hinge between the pectoral and abdominal scutes the flexibility endowed by the ligaments allows these turtles to close up very tightly. 由于胸甲和腹甲之間具有鉸鏈關節，可以通過韌帶活動，所以它們可以將自己牢牢地閉起來。