您搜索了: breathing tube (西班牙语 - 英语)

like breathing.
time.

tracheostomy breathing aid
tracheostomy breathing aid (physical object)

i'm still breathing
i'm still breathing

breathing system expiratory limb
breathing system expiratory limb

tracheostomy breathing aid (physical object)
tracheostomy breathing aid (physical object)

commercial breathing supply hoses diving operation
commercial breathing supply hoses diving operation, device

breathing system expiratory limb (physical object)
breathing system expiratory limb

http://skepticalscience.com/breathing-co2-carbon-dioxide.htm
http://skepticalscience.com/christy-crock-7-part2.html

http://www.skepticalscience.com/breathing-co2-carbon-dioxide.htm
http://www.skepticalscience.com/ipso-impotent-at-curbing-mail-climate-misinformation.html