one; 1; single; a (article); as soon as; entire; whole; all; throughout[cedict]
次
cìㄘˋ
next in sequence; second; the second (day, time etc); secondary; vice-; sub-; infra-; inferior quality; substandard; order; sequence; hypo- (chem., meaning extra oxygen atom); classifier for enumerated events: time[cedict]
空中
kōng zhōngㄎㄨㄥ ㄓㄨㄥ
in the sky; in the air[cedict]
会议
huì yìㄏㄨㄟˋ ㄧˋ
meeting; conference[cedict]
研究
yán jiūㄧㄢˊ ㄐㄧㄡ
research[cedict]
那里
nà liㄋㄚˋ ㄌㄧ˙
there; that place[cedict]
是
shìㄕˋ
is; are; am; yes; to be[cedict]
安全
ān quánㄢ ㄑㄩㄢˊ
safe; secure; safety; security[cedict]
的
deㄉㄜ˙
díㄉㄧˊ
dìㄉㄧˋ
of; structural particle: used before a noun, linking it to preceding possessive or descriptive attributive[cedict]