没有人知道为什么要建这些柱碑。
没有人知道为什么会有陨石从天而降。
有没有人知道为什么或如何解决这个问题呢？
似乎没有人知道为什么萨玛拉丁要杀那些美国人。
No one seems to know Samaruddin's motives for killing Americans.
没有人知道为什么。
没有人知道为什么。
没有人知道为什么。
没有人知道为什么母亲的免疫系统不会自动排斥胎儿。
No one knows why a fetus is not automatically rejected by the mother's immune system.
辣沙司或热的东西对于宿醉效果很好，没有人知道为什么。
Tabasco sauce or anything hot is great during a hangover and no one really knows why.
没有人知道为什么免疫细胞攻击并杀死黑色素细胞在白癜风患者。
No one knows why the immune cells attack and kill the melanocytes in patients with vitiligo.
没有人知道为什么我们要睡觉，但是睡觉是我们必然需要做的事情。
No one knows why we sleep, but it's certain that we need to.
也没有人知道为什么有的树叶会飘落下来，而有的树叶依旧长在树上。
Who knows the reason one leaf falls and another remains? But Ole and Trufa believed the answer lay in the great love they bore one another.
没有人知道为什么一个家猫发出咕噜咕噜的声音，但许多人解释声音作为一种满足感。
No one knows for sure why a domestic cat purrs, but many people interpret the sound as one of contentment.
没有人知道为什么会这样，不过研究发现，越开朗的儿童在日后的生活中饮酒和吸烟的可能性也更大。
No one knows why this should be so, though the study did find that the sunnier children were also more likely to drink and smoke in later life.
没有人知道为什么意志力可以通过训练得到提高，但是它一定反映了一些大脑中的生物变化。
No one knows why willpower can grow with practice but it must reflect some biological change in the brain.
虽然乐器的发明可以追溯到成千上万年之前，每有活动，便有音乐，但却没有人知道为什么我们如此迷恋。
Musical instruments have been found dating back tens of thousands of years. Yet no one knows why we love music, or what function, if any, it serves.
妈妈说，那天晚上我哭着闹着不睡觉，爸爸妈妈怎么哄我我都使劲的哭闹，没有人知道为什么。
Mother said, that night I cried to refuse not to sleep, my parents how I was straining coax me crying, no one knows why.
内森说，没有人知道为什么吸烟与二型糖尿病会有联系，但炎症可能在两者间起到了一定的作用。
Nathan noted that the study can't prove that smoking causes diabetes. It just shows they are associated with each other.
没有人知道为什么在所有M&M豆里绿色的中奖了，不过玛氏公司认为这与绿色代表爱与生殖的古老象征有关。
No one really knows why, of all M&M colors, green took the role of aphrodisiac, but Mars, Inc. suggests the myth plays on the color's ancient association with love and fertility.
曼蒂：这个嘛，没有人能确定。似乎是许多不同动物的混合，但是没有人知道为什么它那么经常出现。
Maddie: Well, no one's sure. It seems to be a mix between many different animals, but no one's sure why it shows up so much.
没有人知道为什么这些差异存在，但一个可能的解释是，被观测的群体中高患病率的人有更多的风险因素存在。
No one knows for sure why these disparities exist. But a likely explanation is that the higher rates are seen among groups of people with more risk factors.
依然没有人知道为什么人类会在这种疼痛感中发现愉悦，罗津博士认为这是一种刺激感，和坐过山车时获取的乐趣相类似。
No one knows for sure why humans would find pleasure in pain, but Dr. Rozin suggests that there's a thrill, similar to the fun of riding a roller coaster.
在翻阅治疗记录时，我注意到，这位50多岁的病人每天都在接受静脉注射抗生素治疗，似乎没有人知道为什么要这样做。
When I looked over the medical chart, I noticed that the patient, in his early 60s, was receiving an intravenous antibiotic every day. No one seemed to know why.
Pío XI冰川在扩展途中将有几个世纪树龄长的大树连根拔起，没有人知道为什么在过去的80年间它扩张得如此之远，如此之快。
Pío is now uprooting trees that are several centuries old. No one knows for certain why it has advanced so far and so fast over the past 80 years.
Pío XI冰川在扩展途中将有几个世纪树龄长的大树连根拔起，没有人知道为什么在过去的80年间它扩张得如此之远，如此之快。
Pío is now uprooting trees that are several centuries old. No one knows for certain why it has advanced so far and so fast over the past 80 years.
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