attenuation

n. 变薄,稀薄化,弄细,衰减

attain to, attainable, attainment, attar, attempt, attempt to do, attempted, attend, attend on, attend to, attendance, attendance allowance, attendance centre, attendant, attender, attention, attentive, attentively, attenuat, attenuate, attest, attestation, attested, attic, attire, attitude, attitude toward, attitudinize, -ise, attn, attorney, Attorney-General, attract, attraction, attractive, attractively, attractiveness, attributable, attribute, attribution, attributive,