电子

In a sentence

• 电子邮件是现代交流的一种重要方式。

  Email is an important method of modern communication.

  Here, '电子' is part of '电子邮件', referring to 'electronic' as a descriptor for mail, indicating it's delivered digitally rather than physically.

• 这个商店出售各种电子产品，包括手机和智能手表。

  This store sells various electronic products, including phones and smartwatches.

  In this sentence, '电子' is used as an adjective for '产品', meaning electronic, indicating products powered by electricity and pertaining to electronics.

• 我正在学习电子工程专业，希望将来设计创新的技术。

  I'm studying electronic engineering, aspiring to design innovative technologies in the future.

  Here, '电子' is part of the noun phrase '电子工程', meaning electronic engineering, referring to the field concerning electronic systems and circuits.