These photos included universal displays of happiness (broad smiles), pride (raised heads, puffed-up chests) and shame (lowered heads, averted eyes).

这些图片包括了被公认的下列表情：快乐(开怀大笑)，骄傲(昂首挺胸)和害羞(低头，转移目光)。

youdao

Doctors could see what they're dissecting using heads-up displays that overlay CT scans onto the organ in question.

FORBES: Robo-docs

Fateh notes that over the years researchers have documented problems associated with heads-up displays, including those used by military pilots.

FORBES: Could Google Glass Hurt Your Eyes? A Harvard Vision Scientist And Project Glass Advisor Responds

Sina Fateh, an ophthalmologist and entrepreneur who has filed at least thirty patents related to heads-up displays, says there is reason to be concerned.

FORBES: Could Google Glass Hurt Your Eyes? A Harvard Vision Scientist And Project Glass Advisor Responds