兼通数国文字
understand several languages
担任教学兼行政工作
carry out both teaching and administrative work
兼秘书职务
undertake secretarial duties
身兼数职
hold several posts
副总理兼外交部长
Deputy Prime Minister and Minister of Foreign Affairs
势难兼办
carry on in both good times and hard times
两种可能，兼而有之。
Both possibilities can happen simultaneously.
这些情况兼而有之。
All of these situations exist concurrently.