The English translation of “情不知所起，一往情深” is “Love at first sight, deep and true.” This phrase can be used to describe the feeling of love that occurs at an unexpected time and is strong enough to overcome any obstacles.
When we say “love at first sight,” we are referring to a state of emotion where we are immediately drawn to someone and feel a deep connection with them. This feeling can be来源于对他们的外貌、性格、声音等方面的一见钟情，或者来自于在相处过程中发现他们的独特魅力和与自己的共鸣。
In this context, “deep and true” can be used to describe the quality of the love that occurs at first sight. This type of love is not just based on looks or新鲜感， but rather on a deep emotional connection that transcends physical appearance and creates a true and meaningful relationship.
The phrase “情不知所起，一往情深” can also be used to describe a type of love that is strong and enduring, even through challenges and obstacles. This type of love is based on the idea that the love between two people is more important than anything else, and that they will work together to overcome any challenges that come their way.
In conclusion, “情不知所起，一往情深” is a phrase that describes the intensity of love that occurs at an unexpected time and is strong enough to overcome any obstacles. It is a phrase that提醒我们要珍惜眼前的爱情，不要轻言放弃，并为之努力付出一切。