[00:02]incidentally 付带地，顺便提及

[00:17]increasingly 不断增加地，日益

[00:32]literally 照字面意义，逐字地

[00:46]merely 仅仅，只不过

[00:57]mostly 主要地，大部分

[01:09]narrowly 狭隘地

[01:21]practically 几乎，实际上

[01:35]presumably 推测起来，大概

[01:48]mammal 哺乳动物

[01:58]