1ADV [n ADVERB]在那里;在其中Therein means contained in the place that has been mentioned. 在那里;在其中 [formal]
By burning tree branches, pine needles, and pine cones, many not only warm their houses but improve the smell therein.
许多人在家里烧树枝、松针和松果,不但给房子取暖,还改善了屋里的气味。
2ADV [n ADVERB]其中(指和刚提及的事情有关)Therein means relating to something that has just been mentioned. 其中(指和刚提及的事情有关) [formal]
Afternoon groups relate to the specific addictions and problems therein.
下午的小组谈到具体的上瘾病例以及其中的问题。
3PHRASE 此即,缘此(用以说明某事是由某种情况导致) When you say therein lies a situation or problem, you mean that an existing situation has caused that situation or problem. 此即,缘此(用以说明某事是由某种情况导致) [formal, or old-fashioned]
Santa Maria di Castellabate is barely mentioned in guidebooks; therein lies its charm.