“The dysmenorrhea is very serious.”常见的英语表述有：“The menstrual pain is extremely severe.” 、“The pain during menstruation is very intense.” 、“The dysmenorrhea is highly serious.” 、“The period pain is very acute.” 、“The pain of menstruation is very grave.” 等。 1. “The menstrual pain is extremely severe.” ：extremely 强调程度“极其”，severe 表示“严重的”，突出了痛经的剧烈程度。 2. “The pain during menstruation is very intense.” ：during 明确指出“在月经期间”，intense 形容疼痛“强烈”。 3. “The dysmenorrhea is highly serious.” ：highly 有“高度地”之意，serious 体现严重性。 4. “The period pain is very acute.” ：period 指“月经周期”，acute 常用来形容“急性的、剧烈的”疼痛。 5. “The pain of menstruation is very grave.” ：of 表示所属关系，grave 有“严峻、严重”的意味。 这些表述都能够传达“痛经很严重”的意思，可以根据具体语境和表达需要进行选择。