Fobt
abbr. fecal occult-blood test 便潜血试验
🗣️ 情景例句
Good morning.
早安。
Grain by grain,and the hen fills her belly.
一颗接一颗，母鸡填饱肚。
It was upon this principle that the first instruments were made,
据这一原理，制造出了最初的地震仪器，