this; these; (commonly pronounced zhei4 before a classifier, esp. in Beijing)[cedict]
严重
yán zhòngㄧㄢˊ ㄓㄨㄥˋ
grave; serious; severe; critical[cedict]
事故
shì gùㄕˋ ㄍㄨˋ
accident[cedict]
的
deㄉㄜ˙
díㄉㄧˊ
dìㄉㄧˋ
of; structural particle: used before a noun, linking it to preceding possessive or descriptive attributive[cedict]
really and truly[cedict]
aim; clear[cedict]
起因
qǐ yīnㄑㄧˇ ㄧㄣ
cause; a factor (leading to an effect)[cedict]
初步
chū bùㄔㄨ ㄅㄨˋ
initial; preliminary; tentative[cedict]
是
shìㄕˋ
is; are; am; yes; to be[cedict]
一
yīㄧ
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]