focus用法：當(dāng)作為動(dòng)詞時(shí)，意為集中、調(diào)節(jié)焦距、集中、聚焦，常與介詞on連用，表示“聚焦于”、“致力于”；作為名詞時(shí)，意為中心點(diǎn)、焦距、調(diào)焦、焦點(diǎn)、源等。
focus的基本釋義及用法介紹
一、作為動(dòng)詞，意為集中(注意力、精力等于);(使)調(diào)節(jié)焦距;集中(光束于);聚焦(于)；與介詞on/upon連用。
例句：The discussion focused on three main problems.
討論集中在三個(gè)主要問題上。
Each exercise focuses on a different grammar point.
每個(gè)練習(xí)各有不同的語法重點(diǎn)。
It took a few moments for her eyes to focus in the dark.
過了好幾分鐘她的眼睛才適應(yīng)了黑暗。
I quickly focused the camera on the children.
我迅速把照相機(jī)的鏡頭對(duì)準(zhǔn)孩子們。
The visit helped to focus world attention on the plight of the refugees.
這次訪問促使全世界關(guān)注難民困境。
二、作為名詞，意為中心點(diǎn)(指人或事物);(眼睛或鏡頭的)焦距，調(diào)焦;(光、聲等的)焦點(diǎn)，中心點(diǎn)，源。
例句：It was the main focus of attention at the meeting.
這是會(huì)議上關(guān)注的主要焦點(diǎn)。
The incident brought the problem of violence in schools into sharp focus .
這次事件使校園暴力成為焦點(diǎn)問題。
The binoculars were not in focus.
這副雙筒望遠(yuǎn)鏡的焦距不對(duì)。
The new system is the focus of controversy
這個(gè)新體制是爭議的焦點(diǎn)。
