外文翻譯----植物的物理特性-文庫吧資料
2025-05-22 11:28本頁面
【正文】 in the leaves. Some leaves turns to yellow or redorange shades in the fall because chlorophyll is replaced bythe pigments anthrocyanin(red),carotene (orange),and xanthophyll (yellow) in varying amounts. The prensence of these pigments causes light rays to be bent and reflect differently, so the leaves change color. Colors are warm or cool,depending upon their hue. Warm colors are those ranging from yellow through orange and into the red hues. Colors ranging from green through blue and into the violet color. Warm colors are bright,inviting,and lively。the result is the absence of coloror black. If all rays are refiected back to surface, the rays are a mixture of different color rays,which results in a color hue. Light rays produce red,orange,yellow,green,bulue,and violet colors. Blends of these color rays produce all of the primary,secondary,and tertiary hues we see. Intenseity is a meansurement of the quality of the basic color in the blend. Bright greens,for example,are said to be intense. Another measurement of light reflection produces a dark color。 in a loose structure,the masses of leaves and corresponding voids dictate light and shadow,causing a coarser than pound leaves of even larger size,and leaves with deep cuts in the margin,like oak leaves,show a finer texture than other leaves ofsimilar size. Plant texture can be felt as well as seen. One good way to study texture is by closing your eyes and feeling the plants. The leaves,branches ,bark and buds,of various plants all feel distinctly different. Some are smooth,some prickly,some downright thorny。
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