1、 后接成分:通常接名词、代词或名词短语(不能接句子);
2、 语域:偏书面/正式,口语中更常用 because of、due to 或 owing to;
3、 逻辑关系:强调“因某种情况而导致另一种结果”,因果关联明确。
The sports meet was canceled by occasion of the severe storm.
(由于暴雨,运动会被取消了。)
She missed the flight by occasion of a traffic jam on the way to the airport.
(因为去机场的路上堵车,她没赶上飞机。)
The project was delayed by occasion of funding shortages.
(由于资金短缺,项目延期了。)
注意与 on occasion of 区分:
on occasion of 意为 “在…之际;值…之时”(强调时间点,而非原因),如:
We held a party on occasion of our teacher’s retirement.
(我们在老师退休之际举办了派对。)
综上,by occasion of 是表达“因果关系”的正式短语,适用于书面语境,后接名词性成分说明原因。