focal
柯林斯词典
1. ADJ Focal is used to describe something that relates to the point where a number of rays or lines meet. 焦點的[ADJ n]
...the focal plane of the telescope. ...望遠鏡的焦平麪。
2. ADJ Focal is used to describe something that is very important. 非常重要的[ADJ n]
...one of the focal centres of the Far East. ...遠東的中心地區之一。
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