Fusion rate, segmental lordosis , and disc height were assessed by roentgenography.是什么意思？

Fusion rate, segmental lordosis , and disc height were assessed by roentgenography.

通过X线评价融合率 、 阶段性脊柱前凸和椎间盘高度.

fusion

n. 融合，熔解，熔化，融合物，[物]核聚变；

例句
His final reform was the fusion of regular and reserve forces.
他最后的一项改革是把常规军和预备役部队合为一体。

rate

n. 速度，比率，等级，（利息等的）费率；vt. 估价，值得，责骂，定级；vt.& vi. 认为，把…算作；vi. 被评价，被认为，被列入，申斥；

例句
The rate of inflation is running at about 2.7 percent.
通货膨胀率大约为2.7%。

segmental

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例句
In the polymerization systems studied, segmental rearrangement is the important rate - determining phenomenon.
在已研究过的聚合体系中链段重排是重要的速度决定步骤.

lordosis

n. 脊柱前弯症；

例句
Fusion rate, segmental lordosis , and disc height were assessed by roentgenography.
通过X线评价融合率 、 阶段性脊柱前凸和椎间盘高度.

and

conj. 和，与，而且，于是，然后，因此；

例句
I spend a lot on expensive jewelry and clothing...
我花很多钱购买昂贵的首饰和衣服。

disc

n. 圆盘，唱片，磁盘；

例句
The turning disc is connected by a drive belt to an electric motor.
转盘由一根传动带与电机相连。

height

n. 高度，海拔，高地，身高，绝顶，顶点；

例句
We've come full circle and dark-blue jeans are once again the height of style.
风水轮流转，时下最流行的又是深蓝色牛仔裤了。

were

be的过去时复数和第二人称单数形式，有时代替 was,用于条件从句、动词 wish 之后等；

例句
Shops, houses, and vehicles were set ablaze.
店铺、房子和车辆全都陷于火海。

assessed

v. 评定( assess的过去式和过去分词 )，估价，对（财产、收入等）进行估价（作为征税根据），确定（损害赔偿金、税款、罚款等）的金额；

例句
What's the property's assessed value?
这些财产的估值是多少？

by

prep. 在…旁边，表示方式，由于，经过；adv. 经过，表示保留或保存时用，短暂拜访；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品