constant species 中文意思是什麼
constant species
解釋
常有種-
The base pair ratio, at : gc, is constant within a species but differs between species
At : gc之間的堿基比具有種內特異性，但在不同種之間往往是不同的。 -
Constant companions are added to the character taxa to form the " characteristic species combination " for associations and higher taxa
恆有伴生種加特徵種構成群叢或更高級分類單位的「特徵種組合」 。 -
A third group of species with diagnostic value are the constant companions.
具有鑒別價值的第三組植物是恆有伴生種。 -
Constant companions are added to the character taxa to form the "characteristic species combination" for associations and higher taxa.
恆有伴生種加特徵種構成群叢或更高級分類單位的「特徵種組合」。 -
At the surface of the pollen grains there are three types of aperturates, including three porates type, three colpates type and three porate - colpates type ; and four types of sculpture, namely, reticulate, striate, striate - reticulate and verrucate. the upper epidermal cells of the leaves of 12 species plants are detected with hpias - 1000 image analytic system through the treatment of binarization, and the experimental methods are proved stable. the results indicated that the waviness of the anticlinal walls ( sfc ) and the ratio of the feret ' s diameter ( slf ) of the epidermal cells of the middle lamina in the third node of leaves starting from the lowerest part of the stem have a relative constant range and could distinguish from each other. oieanolic acid, l, 5, 8 - trihydroxy - 3 - methoxyxanthone and swertiamarin are separately detected on the tlc, and the different chromatogram of various plants can be considered as characters of identification. the contents of oleanolic acid in 12 species of plants are determinated by hplc, but among the different plants and botanical organs their contents are different, and the highest content in flowers
本文對川鄂產獐牙菜屬藥用植物資源進行了野外調查、標本採集和鑒定，對12種乾燥藥材的性狀進行了描述，提供了可以鑒別的特徵。通過掃描電子顯微鏡觀察的12種本屬藥用植物的花粉粒均為單粒花粉，萌發孔有3孔型， 3溝型和3孔溝型三種類型；表面紋飾包括網狀紋，條狀?網狀紋，條狀紋和瘤狀紋四種類型。用hpias ? 1000高清晰度彩色病理圖文分析系統對葉片上表皮細胞作圖像分析，並進行方法學研究，結果表明，同種植物莖上第3節葉片中段主脈和第1側脈之間葉上表皮細胞垂周壁彎曲程度sfc值和細胞縱、橫向直徑的比值slf值，種間有顯著差異，每種都有相對恆定范圍值。 -
But many of those species, known and unknown, are destroyed every day. constant logging, mining and cattle ranching are stripping the jungles clean
但這些眾多的生物種類當中，不管知名的還是不知名的，有許多每天都在遭到毀滅。不斷的伐木、采礦和放牧正在使雨林漸漸地消失。 -
B. different species have different constant of sfc, slf. this is a way that can effectively differentiate all the samples. the foundation of this method provides a new way to identify herbs with leaves
獐牙菜屬不同種植物的sfc 、 slf參數值有顯著差異，都有其恆定范圍值，可以作為鑒別依據之一。 -
Seed - coat micromorphological features seem to be quite constant within species and thus are of significant value in the delimitation of some species
種皮微形態特徵在種內相當穩定，在一些種的劃分上具重要意義。 -
The constant species are often widely distributed species, only because of their abundance are always recurring in land samples.
恆有種是經常廣布的種，就是因為它在樣地里經常大量地和重復地出現。 -
The species is not static. we ' re in a constant state of flux
物種不是靜止的我們處在不斷的變化之中
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