| EXAMPLE SENTENCES | ||
|---|---|---|
初生木质部：指幼嫩植物中来源于原形成层的木质部。 Primary xylem xylem derived from the procambium in the young plant. | ||
可在原生木质部和初始后生木质部的管胞和导管中见到。 It is found in protoxylem and first metaxylem tracheids and vessels. | ||
构成年轮的组织被称为木质部。 Tree rings are made of tissue called xylem. | ||
根的次生木质部导管大。 The secondary structure of root has large vessel diameter. | ||
蕨类植物的木质部只含有管胞。 The xylem of ferns only contains tracheids. | ||
在老茎中，仅最新的木质部环参与物质的运输。这些木质部环组成边材。 In older stems, only the most recent rings of xylem participate in the transport of materials. these make up the sapwood. | ||
蕨类植物和针叶树的木质部仅含有管胞。 The xylem of ferns and conifers contains only tracheids. | ||
叶脉中木质部比重越大，越有利于水分的传输。 Large proportion of xylem benefit to the water transfer. | ||
次生木质部由孔纹导管、薄壁组织及射线所组成。 Secondary xylem consists of pitted vessels, parenchyma fibers and rays. | ||
在横切面上，次生韧皮部的面积比次生木质部大得多。 In the transection section, the area of secondary phloem is much larger than secondary xylem. | ||
