calamites造句
例句与造句
- The family takes its name from its principal genus " Calamites ".
- The horsetail " Calamites " was next on the scene, appearing in the Carboniferous.
- This is the reason pith casts of the inside of " Calamites " stems are so common as fossils.
- Another example, " Calamites cisti ", has much smaller nodes and the ribs are typically closer together.
- The genus " Calamites " of the family Calamitaceae, for example, is abundant in coal deposits from the Carboniferous period.
- It's difficult to find calamites in a sentence. 用calamites造句挺难的
- Precautionary measures against the calamites such as tidal surge, earthquake, Tsunami, cyclone, flood and salinity are being considered in depth.
- In addition, the distance between successive node lines on a " Calamites suckowi " specimen is typically much wider than the diameter.
- In other forms like " Calamites cisti ", the opposite is true or the specimen is just slightly wider than the diameter.
- The vascular cambium of " Calamites " was " unifacial ", producing secondary xylem towards the stem center, but not secondary phloem.
- There researchers discovered " Arthropitys bistriata ", a previously undiscovered type of Calamites, giant horsetails that are ancestors of modern horsetails, with multiple branches.
- One type, " Calamites suckowi ", is distinguishable from other " Calamites " forms by its prominent, swollen nodes and relatively wide-spaced longitudinal ribs.
- One type, " Calamites suckowi ", is distinguishable from other " Calamites " forms by its prominent, swollen nodes and relatively wide-spaced longitudinal ribs.
- Much of the recovered wood material from this formation is of the tree ferns Psaronius and " T . singularis ", with fewer examples of the fossilized stems being of Calamites.
- Unlike the modern horsetail " Equisetum ", " Calamites " had a unifacial vascular cambium, allowing them to develop wood and grow to heights in excess of 10 m.
- The stems of modern horsetails are typically hollow or contain numerous elongated air-filled sacs . " Calamites " was similar in that its trunk and stems were hollow, like wooden tubes.
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