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百度
谷歌
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维基
百科
threshing floor
threshing ground
threshing machine
threshing mechanism
threshing mill
threshing outfit
threshing rig
threshing set
threshing-floor
threshold
threshold acceleration
threshold adjustment
threshold amount of energy
threshold audiogram
threshold character
threshold circuit
threshold coding
threshold concentration
threshold condition
threshold constraint
threshold contrast
threshold control
threshold current
threshold current density
threshold decoder
threshold decoding
threshold depth
threshold detection
threshold detector
threshold dosage
threshing floor
打谷场