to have; there is; there are; to exist; to be[cedict]
调查
diào cháㄉㄧㄠˋ ㄔㄚˊ
investigation; inquiry; to investigate; to survey; survey; (opinion) poll[cedict]
表明
biǎo míngㄅㄧㄠˇ ㄇㄧㄥˊ
make known; make clear; state clearly; indicate; known; to make clear[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]
声波
shēng bōㄕㄥ ㄅㄛ
sound wave[cedict]
是
shìㄕˋ
is; are; am; yes; to be[cedict]
的
deㄉㄜ˙
díㄉㄧˊ
dìㄉㄧˋ
of; structural particle: used before a noun, linking it to preceding possessive or descriptive attributive[cedict]