例句與造句

1. 13 C-enriched compounds are used in the research of metabolic processes by means of mass spectrometry.
2. One important application is in " Stable isotope labeling with amino acids in cell culture " ( SILAC ) . 13 C-enriched compounds are used in medical diagnostic tests such as the urea breath test.
3. This may be somewhat alleviated by isotopic enrichment of 15 N by chemical exchange or fractional distillation . 15 N-enriched compounds have the advantage that under standard conditions, they do not undergo chemical exchange of their nitrogen atoms with atmospheric nitrogen, unlike compounds with labelled hydrogen, carbon, and oxygen isotopes that must be kept away from the atmosphere.
4. It's difficult to find enriched compound in a sentence. 用enriched compound造句挺難的