叉棘 的英文怎麼說
中文拼音 [chājí]
叉棘
英文
pedicellariae-
Cytochrome b gene compared with characiforms, cypriniforms and salmoniforms ; ( 2 ) the molecular phylogenetic trees suggest that siluriforms form a monophyletic group and have a close relationship with characiforms ; ( 3 ) the families of pangasiidae, claroteidae, ictaluridae, cranoglanididae, schilbidae and clariidae form a monophyletic group in the three molecular phylogenetic trees. the family bagridae branched with schilbidae which comes from china ; the family akysidae branched with amblycipitidae, but the phylogenetic positions of the families siluridae, sisoridae and pimelodidae are not recognised
魚芒科、棘脂?科、叉尾?科、長臀?科、刀鯰科與鬍子鯰科在三種方法構建的分子系統樹中均結合在一起，形成一大單系群； ?科均與來自中國的刀鯰科魚類聚在一起；粒鯰科與鈍頭跪科也均聚在一起；但鯰科、 ?科和油鯰科的系統發育位置不定。Cross - components suppression is always the intractability in the studies of tfd and the difficulty in signal processing we should overcome. on the other hand, the cross - components have much information of two ( or more ) signal components, so it is suitable for signal detection
因此，抑制交叉項一直是時頻分析研究領域一個十分棘手的問題，同時也是時頻分析得以更廣泛應用於各信號處理領域所要克服的網難之一。Technical requirements and verification for watches and watch movements ; watches with pallet lever escapement
手錶和手錶機件的技術要求和檢驗.第1部分:棘爪叉瓦式
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