(particle) marker of surprise, sudden realization, reminder[cedict]
正在
zhèng zàiㄓㄥˋ ㄗㄞˋ
in the process of (doing something or happening); while (doing)[cedict]
劲头
jìn tóuㄐㄧㄣˋ ㄊㄡˊ
enthusiasm; zeal; vigor; strength[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]