我国中等收入阶层人数已达 3 亿,占全球中等收入群体的 30% 。
A.
China's mid-income class has reached 300 million, accounting for 30% of the middle-income group globally.
B.
China's mid-income class has reached 3 billion, accounting for 30% of the middle-income group globally.
C.
China's mid-income class amounted to 30 million, accounting for 30% of the middle-income group globally.
D.
China's mid-income class has amounted to 30 million, accounting for 30% of the middle-income group globally.