| 单词 | trace element |
| 释义 | trace element noun[C] uk/ˈtreɪs ˌel.ɪ.mənt/us/ˈtreɪs ˌel.ɪ.mənt/one of severaltypesofsimplechemicalsubstancethat arenecessaryforhealthygrowthanddevelopment, andexistinanimalsandplantsin verysmallamounts 微量元素Biochemistry
Examplesoftrace elementtrace element Calculation of simultaneous isotopic andtraceelementvariations during water-rock interaction with applications to carbonate diagenesis. From theCambridge English Corpus The heat stable factor which effects these increases in growth could be a specific ion or atraceelement. From theCambridge English Corpus Major andtraceelementabundances were measured on fused discs and pressed pellets, respectively. From theCambridge English Corpus We usetraceelementgeochemistry to constrain the protolith source of the amphibolites. From theCambridge English Corpus The effect of crustal contamination on lava compositions is most readily apparent in major andtraceelementdata. From theCambridge English Corpus An amelioration of body weight gain, reduction of mortality and restoration oftraceelementlevels were estimated in infected chickens. From theCambridge English Corpus Based on petrographical investigations, 44 representative samples were selected for major andtraceelementanalyses. From theCambridge English Corpus Thetraceelementvariation within groups is very small. From theCambridge English Corpus Copper is an essentialtraceelementbut most diets contain a little more copper than is needed. From theCambridge English Corpus Identification of petrogenetic processes using covariance plots oftraceelementdata. From theCambridge English Corpus Appendices provide clearly tabulated data on major andtraceelementanalyses for all the samples discussed in these chapters. From theCambridge English Corpus It exhibits a widetraceelementcompositional range. From theCambridge English Corpus We therefore suggest that the analysed part of the gabbroic pegmatite represents a 'cumulate' from which an incompatibletraceelement-enriched melt has escaped. From theCambridge English Corpus Representative basalt samples were selected for major andtraceelementanalysis, excluding those with obvious alteration. From theCambridge English Corpus The changes in major andtraceelementcomposition of the samples are very complex and seem not to change systematically. 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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