3010204:recent major injury,radiation of pain down a leg,pain that is constant,pain in the upper back or chest,unexplained fever or weight loss,and pain that increases at night are all dangerous signs that deserve your concern.想知道的语言点

3010204:recent major injury,radiation of pain down a leg,pain that is constant,pain in the upper back or chest,unexplained fever or weight loss,and pain that increases at night are all dangerous signs that deserve your concern.想知道的语言点
3010204:recent major injury,radiation of pain down a leg,pain that is constant,pain in the upper back or chest,unexplained fever or weight loss,
and pain that increases at night are all dangerous signs that deserve your concern.
想知道的语言点：
1—radiation of pain down a leg：问：这个down这里是方向介词表示在腿的下部?还是:down a leg是个名词词组?表示：小腿?
2—句尾的：and pain that increases at night are all dangerous signs that deserve your concern.这个句子中有几个从句?
是不是这样的：
1.pain that increases at night：中 that increases at night 是前面的名词pain的定语从句.表示：疼痛在夜晚增加
2.are是这句话的真正谓语
3.dangerous signs that deserve your concern：又是一个定语从句.表示：危险的信号应受到你的关心.
整个这句翻译：在夜晚,疼痛的增加 都是危险的信号 应受到你的关心.

3010204:recent major injury,radiation of pain down a leg,pain that is constant,pain in the upper back or chest,unexplained fever or weight loss,and pain that increases at night are all dangerous signs that deserve your concern.想知道的语言点
结构分析
并列主语（共六项）：Recent major injury, radiation of pain down a leg, pain that is constant, pain in the upper back or chest, unexplained fever or weight loss, and pain that increases at night
（其中有两处含有定语从句：[pain] that is constant 和 [pain] that increases at night）
谓语部分：are all dangerous signs that deserve your concern
（其中 that deserve your concern 是 signs 的定语从句）
语言点释疑：
1. radiation of pain down a leg：
——down 是介词,down a leg 指“在一条腿的下部”,这里是名词 pain 的后置定语.“小腿”另有专用名词 crus
2. and pain that increases at night
——与前面提到的一连串症状是并列主语,不能单列看待,其中包括一个定语从句.
3. are all dangerous signs that deserve your concern
——是六个并列主语共同的谓语部分,其中包括一个定语从句.
4. 既然是定语从句,就应该把从句翻译为汉语的定语,句子中的几处含定语从句短语分别翻译如下：
* pain that is constant 经常持续不断地疼痛（因为从句是一般现在时,翻译时可以增补“经常、总是”之类的字眼）
* pain that increases at night夜间加剧的疼痛
* dangerous signs that deserve your concern：应受到你关注的危险信号
参考译文：近来受到的大伤害、一条腿下部的散发性疼痛、经常持续不断的疼痛、上背或胸部疼痛、原因不明的发烧或体重下降,以及夜间加剧的疼痛,这些都是值得你关注的危险征兆.

1. 最近的重大损伤，疼痛顺着腿向下辐射。 2. 上背部或胸部疼痛 3. 晚上疼痛加剧 recent major injury, radiation of pain down a leg, pain that

1.down 介词 向下
2.两个从句：that increases at night that deserve your concern
你的看法是对的