be convinced (that something is true); believe; to accept sth as true[cedict]
一个
yī gèㄧ ㄍㄜˋ
a; an[cedict]
不明
bù míngㄅㄨˋ ㄇㄧㄥˊ
not clear; unknown; fail to understand[cedict]
飞行
fēi xíngㄈㄟ ㄒㄧㄥˊ
aviation; flying[cedict]
上
shàngㄕㄤˋ
on; on top; upon; first (of two parts); previous or last (week etc); upper; higher; above; previous; to climb; to go into; above; to go up; to attend (class or university); third tone of putonghua[cedict]