The phrase 'ตลอดจน (dta-lòt jon)' in Thai language is used to convey the continuation of an action or a condition from the beginning until the end of a defined period of time. It can be closely translated to 'throughout', 'over the course of', or 'until' in English. In sentence construction, it is generally placed between two time references to underline the span of time during which the stated action or condition persists.