"We have a challenge and opportunity to present a new brand in a new setting," he says.

“我们希望用焕然一新的面貌呈现一个全的新品牌，这既是挑战，又是机遇，”他说。

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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。

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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。

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