中国要赶上发达国家，还需要几代人、十几代人的艰辛努力。
It calls for hard work by several and even a dozen generations of China for it to catch up with developed countries.
中国要赶上发达国家，还需要几代人、十几代人的艰辛努力。
To catch up with the developed countries, several, even dozens of generation's efforts are still expected.
中国要赶上发达国家，还需几代人、十几代人的艰辛努力。
It requires arduous efforts of several generations or more before China catches up with the developed countries.
中国要赶上发达国家，还需几代人、十几代人的艰辛努力。
It requires arduous efforts of several generations or more before China catches up with the developed countries.
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