| 词汇 | leaf-trace |
| 释义 | BETA leaf tracecollocation in Englishmeanings of leafand traceThese words are often used together. Click on the links below to explore the meanings. leaf noun[ C ] uk /liːf/ us /liːf/ one of the flat, usually green parts of a plant that are joined at one end to the stem ... See more at leaf trace noun uk /treɪs/ us /treɪs/ a sign that something has happened ... See more at trace Examples of leaf traceleaf trace Lacey (1953) noted that the cross-sectional area of a leaftrace shows a positive correlation with leaf area. There are three pieces of evidence which suggest that all these persistent vascular traces are leaf traces and not small branch traces. The second technique utilizes the leaf traces in juvenile stem or branch coniferopsid wood. In evergreen plants, leaf traces are extended by a type of secondary growth which increases them in length by addition of new tissue. Leaf traces are bundles of vascular tissue which join the living leaf to the primary vascular cylinder at the centre of the young stem. In this organism, these leaf traces continue into the leaf to form their mid-vein. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The leaf gap is a break in the vascular tissue of a stem above the point of attachment of a leaftrace. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The leaf is connected to the stem by the leaftrace, which grows through the leaf gap. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The numerous leaf gaps and leaf traces give a dictyostele the appearance of many isolated islands of xylem surrounded by phloem. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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