While the messages are timestamped, it would be great if there were some stronger visual clues as to which messages are new.

既然每条消息都是时间戳，那么有一些显眼的视觉提示指明哪条消息是新的话将会更好。

youdao

We also observed that many modern user interfaces display intuitive visual clues to communicate the status of a user's interaction with the system.

我们还注意到，许多现代用户界面用直观的视觉提示来表现用户与系统间的交互情况。

youdao

No visual clues: a liar won't get a long nose like Pinocchio but you can catch them out by listening to their tone of voice.

没有可视线索：骗子不会像匹诺曹那样变成长鼻子，但是你能靠听声音来揪出他们。

youdao

In many regions of Mars, dust-devil tracks and shadows have been seen from orbit, but those visual clues have not been seen in Gale Crater.

ENGADGET: Curiosity rover finds radiation levels on Mars are safe for humans