51.   The generating system breaks down periodically, but the Mir is so large that the existing oxygen supply is sufficient to last for several days.

52.   The existing oxygen supply is good for several days, and there are also backup oxygen canisters if needed.

53.   The existing oxygen supply lasts for several days and the crew also has a supply of air canisters.

54.   The existing oxygen supply is good for several days, and the crew also has a two-month supply of oxygen canisters if needed.

55.   The Nobel laureate was breathing on her own but was hooked up to an oxygen supply to make breathing easier.

56.   The Mir has had no trouble with its oxygen supply since the station has a second fully operational Elektron generator, the ITAR-Tass news agency reported.

57.   The Nobel Peace laureate was breathing on her own but was hooked up to an oxygen supply to make breathing easier, Sen said.

58.   The oxygen generating system breaks down periodically, but the Mir is so large that the existing oxygen supply is sufficient to last for several days.

59.   The sickles get trapped in tiny blood vessels, reducing oxygen supply, damaging organs, and weakening the immune system.

60.   They often block blood vessels, restricting oxygen supply.