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但这无济于事
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DEFINITIVE EXAMPLES 权威例句〔HOPE〕The firemen tried to stop the flames from spreading, but it was hopeless. 消防队员试图阻止火势蔓延,但这无济于事。朗文写作活用
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diacetoxyl
diacetoxylphenylisatin
diacetoxysciroenol
diaceturia
diacetyl
diacetyl
diacetyl acetic acid
diacetyl acetic ester
diacetyl acetone
diacetyl amide
diacetyl anilide
diacetyl benzidine
diacetyl butter
diacetyl diaminodiphenylsulfone (DADDS)
diacetyl disulfide
diacetyl monomethoxime
diacetyl morphine
diacetyl morphine
diacetyl oxide
diacetyl peroxide
diacetyl tannin
diacetyl urea
diacetyl-carbinol
diacetyl-glucose
diacetylamidoazotoluene
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更新时间:2026/8/17 0:22:58