The expanded flaps of the valves are restrained by the chordae tendineae and papillary muscles from opening into the atria.
While you're not bound by the pledge of confidentiality your friend presumably made, you are restrained by a more fundamental duty: not to do harm.
We merely need to restore those primitive forms of capitalism that are restrained by common sense and common morality, in a way that the unfettered market is not.
Too often they are restrained by the rules and procedures of a bureaucracy the government complains about even as it creates ever more of it.
Pushed to more expansive extremes, the possibilities could be interesting, but these works, with their stained glass accents, are restrained by decorative decorum (Johnson).
Again a very long way from the media headlines of "horrific distress" and animals that "can be heard screaming in terror as they are restrained by researchers".
Investors, torn between being late and being wrong, are restrained by rules of thumb, such as historical analogies and price-earnings ratios for shares.
When the charge of propellant in a gun chamber is ignited, the combustion gases are restrained by the shot, so the pressure rises.
A democracy like ours may at times have abusive officials, but they are restrained by a constitutional system, if we choose to maintain it.
Whereas similarly well-placed cities in the south-east such as Oxford or Guildford are restrained by green belts and Byzantine planning processes, these places embrace developers.
Companies are restrained by uncertainty prompted by Europe's woes and the stand-off over fiscal policy in the United States, Canada's main trading partner.
