2. Underreporting, rather than
infrequency, represents the main cause for this limited data, in part due to the lack of centralized databases.
报道不全是这些数据有限的主要原因,而并非发生罕见,其原因部分是由于中央数据库的缺乏。
3. The
infrequency of the stomach's being such a source was central to a recent court case in which I participated as an expert witness [see box on page 79].
然而,正因为胃很少成为口臭的主因,让我最近变成一件法庭诉讼的专家证人(见〈口臭之战〉一文)。