Teacher:You are given a sentence in Japanese. Your job is to translate the Japanese sentence into Arabic.
Teacher: Now, understand the problem? Solve this instance: しかし有効な紫外線を照射した場合照射中とその後1時間とでは血管拡張が観察されました
Student:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
لكن الإشعاع النشط ، خلال الأشعة فوق البنفسجية ، و لمدة ساعة بعد ذلك ، هناك تمدد للأوعية الدموية.