Surgery and X - irradiation nevertheless remain the bulwarks of cancer treatment throughout the world.是什么意思？

Surgery and X - irradiation nevertheless remain the bulwarks of cancer treatment throughout the world.

外科手术和 X 射线疗法依然是全世界治疗癌症的主要方法.

surgery

n. 外科学，外科手术，手术室，诊所，诊断时间；

例句
For many, the dentist's surgery remains a torture chamber.
对许多人来说，牙医的治疗室一直是间受刑室。

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。

irradiation

n. 放射，照射，光渗；

例句
Dry oxidation of benzoin with air under microwave irradiation gave benzil in excellent yield.
研究了微波辐射下干法氧化苯偶姻生成苯偶酰的反应.

nevertheless

adv. 然而，尽管如此，不过，仍然；conj. 然而，尽管如此；

例句
There had been no indication of any loss of mental faculties. His whole life had nevertheless been clouded with a series of illnesses.
没有迹象显示他的智力受到了损害，但是他的一生却是疾病缠身。

remain

n. 剩余物，残骸，残余，遗迹，遗体；vi. 留下，保持，留待，依然；vi.& link-v. 搁置，剩余，剩下，逗留，终属，归于；

例句
The threat is likely to remain in abeyance until next year's meeting in Reykjavik.
这一威胁很可能会一直存在下去，直至明年的雷克雅未克会议。

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

bulwarks

n. 堡垒( bulwark的名词复数 )，保障，支柱，舷墙；

例句
The freedom of the press is one of the great bulwarks of liberty.
新闻自由是自由最大的保障之一.

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

cancer

n. 癌症，恶性肿瘤，弊病，社会恶习，迅速蔓延的恶劣的或危险的事物，[天]巨蟹座，巨蟹宫；

例句
An increasing body of evidence suggests that all of us have cancer cells in our bodies at times during our lives.
越来越多的证据表明，我们所有人一生中体内时有癌细胞存在。

treatment

n. 治疗，疗法，处理，待遇，对待；

例句
He was admitted yesterday for treatment of blood clots in his lungs.
他昨天入院治疗肺部的血块。

throughout

prep. （表示时间）自始至终，在…期间，遍及…地域，遍及…场所；adv. 处处，始终，在所有方面；

例句
Most officers and men acquitted themselves well throughout the action.
大多数军官及士兵在整个战斗中表现出色。

world

n. 世界，地球，领域，尘世；

例句
Rosie's idyllic world came to an abrupt end when her parents' marriage broke up...
父母婚姻的破裂使得罗茜田园诗般美好的世界陡然画上了句号。