Arnold's operculum
[醫] 阿諾德氏蓋(島蓋)
?? 詞語組成解析
n. 葉蓋, 鰓蓋骨\\n[醫] 蓋, 島蓋, 蓋(昆蟲), 厴(軟體動物), 鰓蓋(魚)
??? 情景例句
Really, Mr. Marchetta?
真的嗎，Marchetta先生？
Hurray!
萬歲！
From 1830 onwards in the USA and from about 1870 in Canada, settlers began to move westwards and to take possession of the plains as their own.
美國自1830年起，加拿大從1870年左右起，殖民者開始向西遷移，并把平原據為己有。