You can lose pictures if you never sync with I Photo.

如果你从来不与iPhoto同步的话，你可能会丢失照片。

youdao

Alarm clock, world clock, calendar, calculator, memo, Email, PC sync, photo album, photo editor, wallpaper and games.

闹钟，世界时钟，日历，计算器，备忘录，电子邮件，电脑同步，相册，相片编辑器，墙纸和游戏。

youdao

Alarm clock, calculator, memo, translate machine, my pet, 3d message, easy search, English dictionary, file viewer, PC sync, photo caller ID, photo album, photo editor, wallpaper and games.

闹钟，计算器，备忘录，翻译机，我的宠物，三维信息，易于搜索，英文字典，文件浏览器，PC同步，来电照片，相簿，相片编辑，墙纸和游戏。

youdao

Google is charging down the same path: it offers music sync, photo sync, Exchange-like sync, cloud storage, remote device back-up and updates.

FORBES: Windows Phone Beats iPhone by 2015? Not Likely!

Facebook has added a new photo sync feature that can automatically upload photos from a phone to a private Facebook album on the web.

FORBES: Facebook Now Auto-Uploads Mobile Photos To Web

For them the photo sync makes perfect sense.

FORBES: Facebook Now Auto-Uploads Mobile Photos To Web