| 单词 | trilobite |
| 释义 | trilobite noun[C] biology,geologyspecializeduk/ˈtraɪ.lə.baɪt/us/ˈtraɪ.loʊ.baɪt/asimple,flatseacreaturethatlivedin theearliestperiodoflifeonearth, with a hardouterlayerand abodyin threeparts 三叶虫 De Agostini Picture Library /De Agostini Editoria/GettyImages Sea creatures
Examplesoftrilobitetrilobite Some, such as those on brachiopods, trilobites and chitinozoa, record information pooled by many specialists; others are the work of one or a few workers. From theCambridge English Corpus Though commonly observed, blindness in trilobites remains difficult to explain in terms of adaptation. From theCambridge English Corpus The trilobites are disarticulated and generally fragmentary, which may indicate that they have been subjected to post-mortem transport. From theCambridge English Corpus Distribution of trilobites within these formations is random, and boundaries between the lithostratigraphic units are typically not exposed. From theCambridge English Corpus Thetrilobitewas collected from a bed that is 28 cm thick, composed of limestone (moderately resistant micritic mudstone to wackestone). From theCambridge English Corpus The similarities are observed on the genus level, whereas on species level, trilobites from all these areas display a distinct endemicity. From theCambridge English Corpus The latter is well illustrated, with comments on faunas and facies, and listing the trilobites which have been found in particular formations and members. From theCambridge English Corpus Many specimens are incomplete, and this, together with their co-occurrence with fragmentary trilobites, spicules of sponges, sclerites of chancelloriids and other shelly organisms, suggests transportation. From theCambridge English Corpus Wellpreserved, non-abraded brachiopods and club-like bryozoans are abundant, whereas gastropods and disarticulatedtrilobitecuticles are sparse. From theCambridge English Corpus It also increases our knowledge of the evolution of early ontogeny in proetoid trilobites. From theCambridge English Corpus We could all write of our firsttrilobitefind. From theCambridge English Corpus These cor relations are based on small shelly fossil andtrilobitetaxa. From theCambridge English Corpus Skeletal grains are disarticulated and generally from brachiopods and trilobites. From theCambridge English Corpus Much scarcer are other types of bituminous skeletal limestones, which consist mostly of crinoid ossicles associated with rare brachiopod andtrilobiteremains. From theCambridge English Corpus Despite extensive searching, no specimens were found stratigraphically lower in the outcrop, and lack of exposure prevented sampling just above thetrilobiteoccurrence. From theCambridge English Corpus 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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