Magnesium ammonium carbonate
[化] 碳酸銨鎂
?? 詞語組成解析
magnesium
[m?g'ni:zj?m]
n. [化]鎂（金屬元素）;
n. 銨\\n[化] 銨
carbonate
[['kɑ:b?neit]]
n. 碳酸鹽\\nvt. 使碳酸鹽化, 使充滿二氧化碳
??? 情景例句
in the past few weeks.
在最近幾個星期。
But the yesterday's forecast reported it'd be fine.
不過，昨天的預報說是會放晴的。
The bison skins were sent by rail to cities to be sold.
野牛皮用火車運到城里出售。