Definition
Used before an adjective to emphasize a high degree or an excessive amount of something, indicating 'very' or 'too'.
很樂意的，极為樂意的（強調正面意涵）
"Would you be willing to help us move these boxes?" "I would be only too happy to help."
「你願意幫我們搬這些箱子嗎？」「我非常樂意幫忙。」
She was only too interested in the job, so she readily accepted the position.
她對這份工作非常感興趣，所以欣然接受了這個職位。
They were only too aware of the risks involved in the project, so they decided not to proceed.
他們非常清楚這個項目涉及的風險，所以決定不繼續進行。