(located) at; (to be) in; to exist; in the middle of doing sth; (indicating an action in progress)[cedict]
礁石
jiāo shíㄐㄧㄠ ㄕˊ
reef[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]
拼命
pīn mìngㄆㄧㄣ ㄇㄧㄥˋ
doing one's utmost; with all one's might; at all costs; (working or fighting) as if one's life depends on it[cedict]
挣扎
zhēng zháㄓㄥ ㄓㄚˊ
to struggle; struggling[cedict]
于是
yú shìㄩˊ ㄕˋ
thereupon; as a result; consequently; thus; hence[cedict]