方便随身携带portable

• 今后人类将开发出便携的廉价能源。

  In the future mankind will develop low-cost portable sources of energy.

• 他觉得随着便携电脑的继续发展，报纸的媒体地位会被网站逐步代替。

  With the continued development of portable computers, he believes that the status of print newspapers in the media will be slowly overtaken by websites.