The writings in the vernacular movement in 1920's showed much more restrictions in background.

1920年代的白话文运动展示了更多背景性制约。

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Background-: In response to residency work hour restrictions, programs restructured call schedules, increasing the use of short call (daytime admitting teams).

背景：为了响应缩短住院时间，计划重新调整时间表，提高短期要求住院的使用。

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The restrictions require background checks on all firearm purchases, ban the sale of ammunition magazines with more than 10 rounds and expand a ban on the sales of assault-style weapons.

WSJ: Conn. Gun Fight Continues

Giffords, who is still recovering from her critical wounds, has in recent months become a champion of universal background gun checks and other gun restrictions denounced by Second Amendment proponents.

WSJ: Arizona gun proponents launch free gun program

There are signs, though, that the NRA is growing out of touch with modern Americans and even with its own members who, according to surveys, now tend to support restrictions such as mandatory background checks on buyers of weapons at gun shows.

ECONOMIST: Despite legislative victories, the NRA is under pressure