11. Frequently, the onset of leukemia is more gradual, the patient becoming aware during the course of a month or two of progressive weakness, anorexia, pallor and lowgrade fever.

[譯文]白血病的發(fā)病往往比較緩慢，患者能意識到在一二個月內(nèi)有進行性衰弱、厭食、蒼白和低熱等癥狀。

[說明]形容詞aware的支配介詞為of，被起時間狀語作用的介詞短語 during the course …or two 所分隔。

12. A careful inquiry should be made into recent localized infections, especially of the ear，and trauma to the head, as these predispose to secondary bacterial meningitides.

[譯文]對近期的局部感染應(yīng)作仔細(xì)的了解，特別是耳朵的感染和頭部的外傷，因為這些感染易誘發(fā)繼發(fā)性細(xì)菌性腦膜炎。

[說明]名詞inquiry的支配介詞為into，被句子謂語should be made所分隔。