筛孔    sieve mesh?

筛孔    sieve opening?

筛渣    sieve residue?

筛子    sieve?

视准轴    sight axis?

视准线    sight line?

照准装置    sighting device?

照准标    sighting mark?

照准面    sighting plane?

照准点    sighting point?

照准    sighting?

旅游地    sightseeing district?

旅游地    sightseeing place?

旅游资源    sightseeing resource?

标志    sign?

信号风速计    signal anemometer?

通信枢纽    signal center?

信噪比    signal to noise ratio?

信号    signal?

标志点    signalized point?

显著性水平    significanc level?

显著性检验    significance test?

有效波陡    significant slope?

有效波高    significant wave height?

硅铝率    silica alumina ratio?

硅砂    silica sand?

硅铝铁率    silica sesquioxide ratio?

硅酸盐    silicate?

硅化过程    silicatization process?

硅质结核    siliceous concretion?

硅质岩类    siliceous rocks?

硅质沉积    siliceous sediments?

硅质页岩    siliceous shale?

硅华    siliceous sinter?

硅土矿渣    siliceous slag?

硅质土壤    siliceous soil?

硅酸    silicic acid?

硅化    silicification?

硅化木    silicified wood?

硅    silicon?

硅肺    silicosis?

丝网印刷    silk screen printing?