英语语法分析

Good stereoselectivity in this reaction was observed.

反应有较好的立体选择性。

These, cycloaddition reactions proceed with stereoselectivity.

上述反应具有(顺，反)立体选择性。

The stereoselectivity was improved by increasing steric hindrance of the reactions.

通过增加反应的空间位阻改进了反应的立体选择性。