無孔粉屬 的英文怎麼說
中文拼音 [wúkǒngfěnzhǔ]
無孔粉屬
英文
aporina-
The colpal membrane is nearly smooth but with granular, spinulose or tuberculate protuberances. the pollen grains show great variations between the genera in the tribe hyoscyameae in terms of the presence or absence of the germination aperture and its type, and the exine ornamentation, and thus can be used as important characters in the consideration of the phylogenetic relationship of this tribe
各屬植物的花粉形態在萌發孔的有無、萌發孔的類型和外壁紋飾等方面有較大的差異，可以作為探討屬間分類和系統關系的重要依據c天仙子族植物花粉萌發孔的演化趨勢為：無萌發孔一3 、 4溝一3孔溝。Results showed that the pollen grain of p. mira, which is used as material by sem for the first time, was nearly elliptic in shape and the extine pattern was simply striped with no pores
結果表明，光核桃花粉粒的形態呈橢圓球形，其外壁紋飾呈簡單的直紋平行型，無穿孔，是最原始的桃亞屬植物野生種，未發現與栽培種有直接的關系。There are mat - shaped thickenings at the base of spines in the certain species of machilus. the most reliable characters for the delimitation of species are the features of the perforation, mat - shaped thickenings. the evolutional trends of the extine ornamentations in the pollen grains were discussed
小刺和瘤狀突起光滑，一些花粉形態特徵如小孔的有無、墊狀突起的有無和形態差別的多樣性可以作為種間鑒定的依據，對于現有的潤捕屬植物分組有一定的借鑒價值。Powder metal is often used instead because it is undesirable or impractical to join the elements through alloying or to produce parts by casting or other forming consists of producing small particles, compacting, and sintering. the squeezing pressure with added heat bonds the metal powder into a strong solid. powdered metals can be ferrous, nonferrous or a combination of ferrous and nonferrous elements
金屬合金一般是無孔隙固體；因為煉制出的合金的實際效果不理想，或者通過鑄造和其他成型方式對小的顆粒進行壓制，燒結出來的產品零件無法滿足需求，因而人們常常使用粉末金屬來代替金屬合金。分享友人