【医】 博思人工呼吸器(木制人工呼吸器)

take one's courage in both hands

both

make both ends meet

boost(increase, raise，or step up) production both intensively and extensively

both parties

be small at both ends and big in the middle; a few at each extreme and many in between

protect the legitimate rights and interests of both consumers and producers

be ready to both serve as an offical and be one of the common people