1. He follows the crowd at a crucial moment.
    他在关键时刻总是随波逐流。

2. During a single crucial three-week period during our teenage years, chemical activity in the brain is cut in half.
    我们的青少年阶段有一个为期三周的关键时期，此时脑部的化学反应活动一分为二。

3. As the heads of next-generation start-ups, these Asian innovators can draw on customs and languages to forge tighter links with crucial Pacific Rim markets.
    作为新掘起一代的带头人，亚裔发明家可以凭借他们在习惯和语言上的优势，与关键的太平洋沿岸市场建立起更加牢固的联系。

4. "Such access will be crucial to obtaining a high-quality education and getting a good job.
    他说："这种权利对于获得高质量的教育、找到好工作都将至关重要。

5. Another crucial factor is the need for parents to have proper conversations with their children.
    另一关键因素是父母应该与孩子进行适当的交谈。