No. 689 in Chinese
同時
At the same time.
In a sentence
他在工作的时候，同时听音乐。
He listens to music at the same time as working.
同时 is used to indicate two actions happening concurrently: working and listening to music.
为了同时解决两个问题，我们设计了一个综合方案。
In order to address two problems at the same time, we designed an integrated plan.
同时 is used here to express a time frame where two issues are being resolved together, emphasizing the simultaneity of the solution.
她既是学生，同时也是一名志愿者。
She is both a student and a volunteer at the same time.
同时 emphasizes her concurrent roles of being a student and a volunteer, stressing the coexistence of the two statuses.
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