Piano and cello are given equal roles in the sonata in a (Op. 69), a break with the 18th-century format of a piano sonata accompanied by an instrumental obbligato.
作品69号A调奏鸣曲中，钢琴与大提琴平分秋色，这种方式打破了18世纪以前钢琴奏鸣曲中，其他器乐占次要角色的布局。
A song with a flute obbligato.
长笛伴奏的一首歌。
Recently, flow cytometry becomes one of the obbligato tools in the procedure of diagnosis of hematological malignant tumors and has been widely used in clinical test.
流式细胞术已成为诊断血液系统恶性肿瘤不可缺少的工具，广泛应用于白血病的临床检测。
Recently, flow cytometry becomes one of the obbligato tools in the procedure of diagnosis of hematological malignant tumors and has been widely used in clinical test.
流式细胞术已成为诊断血液系统恶性肿瘤不可缺少的工具，广泛应用于白血病的临床检测。
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