Try to focus on one task at a time instead of multitasking.
尝试一次只专注于一项任务，而不是同时处理多件事。
2
n.焦点，核心；关注的中心
Climate change has become the main focus of international negotiations.
气候变化已成为国际谈判的主要焦点。
3
n.专注（状态），集中力
She maintained sharp focus throughout the three-hour exam.
她在三小时的考试中始终保持高度专注。
语感
focus on = 把镜头对准——其他的全虚化
专注聚焦焦点核心
focus on 是使用频率最高的搭配，注意介词必须是 on。in focus（清晰对焦）/ out of focus（模糊失焦）是摄影语言延伸到日常的固定表达。动词时态变化注意：focus → focused / focusing（双写 s 是英式，focus → focussed / focussing；两种拼写都被接受）。concentrate on 与 focus on 语义接近，但 concentrate 更强调意志力的努力，focus 更中性，描述方向性。
陷阱
⚠️focus on，不是 focus in / focus at
✗
The research team should focus in the environmental impact of plastic waste.
（误）研究团队应专注于塑料垃圾的环境影响。
focus 表示「专注于某事物」固定搭配是 focus on，不用 in 或 at
✓
The research team should focus on the environmental impact of plastic waste.
研究团队应专注于塑料垃圾的环境影响。
⚠️out of focus：模糊，不是「失去关注」
The background of the portrait was intentionally out of focus.