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He began to learn the accordion at the age of 4,and he started to learn the piano when he was seven.

他开始学习4岁的手风琴，他开始学习钢琴，七岁时。

I began to doubt the accuracy of his statement.

我开始怀疑他的声明的正确性。

When it was apparent that urine pH, and not ash or magnesium was the problem, they began to add Ammonium Chloride to their cat foods to acidify the diet.

当越来越多的事实表明，这个问题的关键并非是灰分或镁，而是尿酸碱值，宠物食品制造商开始往生产的猫食中添加氯化铵以酸化食物。

Through all this test analyse Pathogenicity and Immunological status of ALV-J Inner Mongolia strain, the result showed the infected chickens began to have pathological change of Myelcytomatosis at 3-week: the main pathological changes of acidophile myelocyte were found in bone marrow and between cardiac muscle fibers,and there were many granules in the hyalotome.This kind of oncocyte proliferated in every tissue at different amount, but the cells that proliferated in bone marrow, cardiac muscle fiber, oarium were much more than other tissue, and they often developed neoplasma. At same condition,there were no abnormalty advent in control group, In immunological aspect: the increase of lymphokine and ANAE positive cells showed cell-mediated immunity was strengthend during antineoplastic infection; the emergence of ALV-J antibody of ELISA suggest there was humoral immunity exist at the same time.

结果显示：脾脏PCR检测结果表明1、2两实验组均有阳性病例出现，而对照组全部为阴性，说明实验鸡体内已有ALV-J内蒙株感染；接种病毒后3周龄开始出现骨髓细胞瘤病的病理变化：肝脏、脾脏有程度不同的肿大，镜下观察，骨髓内最早出现了与骨髓细胞相似、形态基本一致的大型圆形或椭圆形、胞核较大多为椭圆形、胞浆内含有大量嗜酸性圆形颗粒的髓细胞样瘤细胞增生，随后通过血流瘤细胞可转移到肝脏、心肌、卵巢或睾丸等组织并形成肿瘤性病灶，而对照组没有出现明显病变；免疫状态方面：以脾脏淋巴因子和ANAE阳性细胞增多说明细胞免疫在抗肿瘤感染过程中增强，ELISA检验实验鸡抗体出现阳性的结果表明同时也存在着体液免疫。

I became acquainted with him when I began to go to school.

我开始去上学时，我就认识他了。

I wonder if I can get some advice from you, he began, and received an acquiescence of willingness that made his heart bound

"我不知道你是否可以告诉我，"他开始了，对方的默许使他的心怦怦地跳，你还记得吧？

In 1835, the new government began a serious effort to restore the Acropolis.

在1835，新一届希腊政府开始花大力气修复卫城。

His arthritis began to act up again.

他的关节炎又开始发作了。

She began to explain her plan of action to the group.

她开始向小组讲解她的行动计划。

Now I began to understand: As a writer, I was also an activist.

如今我开始醒悟，作为一名作家，也可以积极参与。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。