(located) at; (to be) in; to exist; in the middle of doing sth; (indicating an action in progress)[cedict]
阵地
zhèn dìㄓㄣˋ ㄉㄧˋ
position; front[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]
他
tāㄊㄚ
he; him[cedict]
必须
bì xūㄅㄧˋ ㄒㄩ
to have to; must[cedict]
凭借
píng jièㄆㄧㄥˊ ㄐㄧㄝˋ
to rely on; using[cedict]
自己
zì jǐㄗˋ ㄐㄧˇ
self; (reflexive pronoun); own[cedict]
的
deㄉㄜ˙
díㄉㄧˊ
dìㄉㄧˋ
of; structural particle: used before a noun, linking it to preceding possessive or descriptive attributive[cedict]