Heptoxide
[建] 七氧化物
🗣️ 情景例句
Real proud.
真的骄傲。
Custom is a second nature.
习惯是第二天性。
but although our faith in many of the things in which our forefathers fervently believed has weakened,
可是虽然我们对我们祖先笃信的许多事物已不太相信，