1. At the present time the cause of leukemia is not clear.
目前甶血病的病因尚不明了。
2. Treatment depends on the cause and on the symptoms and signs present.
治疗根据病因及所出现的症状和体征而定。
3. The article presents a new approach to the subject.
本文提出对这一课题的新的处理方法。
4. Acute malaria in children rarely present a classic clinical condition.
儿童患急性疟疾很少有典型的临床表现。
5. This present is meant for you.
这件礼物是准备给你的。
6. There is no specific treatment for the disease at present.
目前对此病尚无特殊的治疗方法。