joint study的用法和樣例：
例句
- Midday naps appear to lower the risk of death by cardiovascular disease, according to a joint Greek-American study.
一份希臘和美國的共同研究指出，睡午覺對降低心血管疾病之風險很有幫助。 - The results of a collaborative study on salt in local markets are announced by the FEHD and the Consumer Council.
本署與消費者委員會公布就本地市場多款食鹽共同研究的調查結果。
