第二

The school's primary focus is on academic excellence, but secondary goals include developing social skills and physical fitness.
学校的主要目标是学术卓越，但次要目标包括培养社交技能和身体健康。
Secondary research involves using existing data, such as government statistics or published studies, to inform your own research project.
次级研究涉及使用现有数据（如政府统计或已发表的研究）来为自己的研究项目提供信息。
After addressing the primary concerns of the project, the team turned their attention to the secondary issues that needed to be resolved.
在解决项目的主要问题后，团队将注意力转向了需要解决的次要问题。
The secondary characters in the novel are just as well-developed as the main ones, providing depth to the story.
小说中的次要角色和主要角色一样发展得非常好，为故事增添了深度。
The primary election determines the party's official candidate, while the secondary election decides who wins the overall race.
初选确定政党的正式候选人，而复选决定谁赢得总体比赛。
Secondary education typically refers to schooling provided after primary education and before tertiary education.
中学教育通常指在小学教育之后、高等教育之前提供的教育。
In the event of a power failure, the secondary battery will automatically take over to ensure continued operation of critical systems.
在电源故障的情况下，备用电池会自动接管，以确保关键系统的持续运行。
Secondary metabolites produced by plants can have medicinal properties, and are often used in pharmaceuticals.
植物产生的次生代谢物可能具有药理特性，经常用于制药行业。
The primary objective of the mission was to deliver supplies, with secondary objectives including reconnaissance and establishing communication links.
任务的主要目标是运送补给，次要目标包括侦察和建立通信链接。
In many ecosystems, secondary consumers, such as snakes and birds, feed on primary consumers like insects and small mammals.
在许多生态系统中，次级消费者（如蛇和鸟类）以初级消费者（如昆虫和小型哺乳动物）为食。