Network scours out 21st century a new world as tempest, and brings both opportunity and challenge for ideological education in institutions of higher education.
网络如同暴风骤雨般将21世纪冲刷成一个全新的世界，给高校思想教育工作带来了机遇与挑战。
The author thinks that green chemistry is a new subject in the 21st century and it provides new challenge and opportunity to chemistry workers.
认为绿色化学是21世纪的一个新课题，给化学工作者们提供了新的挑战和机遇。
The human society is facing challenge and opportunities in the new century.
新的世纪，人类社会面临着挑战和机遇。
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