单词	step ladder
释义	step ladder Thesaurus Noun 1. step ladder - a folding portable ladder hinged at the topstepladderladder - steps consisting of two parallel members connected by rungs; for climbing up or down EncyclopediaSeeLadder step ladder noun Synonyms for step ladder noun a folding portable ladder hinged at the top Synonyms stepladder Related Words ladder
随便看	passive movement test passive multichannel microwave radiometer passive narrowband passive neonatal immunity passiveness passive network passive neutron coincidence counter passive night goggles passive night vision device passive noise reduction passive nondestructive assay passive obedience passive object flow programming passive occupant detection system passive operating system fingerprinting passive optical fast frequency-hopping passive optical lan passive optical multiplexer passive optical network passive optical sample assembly passive optical satellite surveillance passive optical seeker technique passive or responsive public affairs policy passive over-consumption passive parameterized interpolation

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