| 词汇 | strontium |
| 释义 | strontium noun[ U ] uk /ˈstrɒn.ti.əm/ us /ˈstrɑːn.ʃi.əm/(symbolSr) a chemical element that is a soft, silver-white metal that burns easily with a bright red flame, used in fireworks and some televisions锶（一种银白色的软金属化学元素，容易燃烧，发出明亮的红色火焰，用于生产焰火和某些彩色电视） Chemical elements actinium alkali metal americium astatine berkelium brimstone bromine calcium fluorine germanium lithium manganese nickel plutonium quicksilver selenium silicon sodium sulphur transition metal Examples of strontiumstrontium However, neither e strontium and ethanol individually, nor the association of both were efficient to produce parthenogenetic blastocysts. Intense emission was observed for strontium with hydrogen gas, but no emission was observed with hydrogen or strontium alone. Only one calf was obtained in the group activated with ionomycin and strontium. A live female calf was obtained when ionomycin/strontium were used, but it died 30 days after birth. This work is supported by partial strontium isotope data that clarify some key biostratigraphic problems. All samples have been analysed for strontium isotope ratios; these fall in the range 0.70645 to 0.70710. The previously suggested correlation is not valid even if the strontium isotope system was reset. Post-depositional contamination of tooth enamel (diagenesis) is normally not significant in strontium-isotope studies. The presence of diagenetic strontium in an enamel sample could mask evidence for migration. The ability of embryos activated in strontium to undergo blastocyst development, establish pregnancy and generate live newborn was evaluated. Strontium-isotope studies have focused on tooth enamel rather than bone. It should also be noted that strontium-isotope ratios in rock commonly vary from the ratios measured for fauna and flora. When artificial stimulation with strontium was used, the fertilization of oocytes with heated or ethanol-treated spermatozoa was completely rescued. Virtually all strontium in vertebrate organisms is found in the skeleton. 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. |
| 随便看 |
|
反思网英语在线翻译词典收录了377474条英语词汇在线翻译词条，基本涵盖了全部常用英语词汇的中英文双语翻译及用法，是英语学习的有利工具。