抽样调查 chōu yàng diào chá

DEFINITIONS

  1. sampling survey; sampling investigation

CHARACTERS

抽 chōu
HSK 4
draw out, pull out; sprout
样 yàng
HSK 1
shape, form, pattern, style
调 diào
HSK 3
transfer, move, change; tune
查 chá
HSK 3
investigate, examine, seek into