Current crowding theories explain crowding through the following aspects: environmental stress, individual behavior reactions etc.

现有拥挤理论从环境刺激和个体行为反应等多个角度对拥挤进行了阐释。

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On top of that, large current budget deficits are crowding out small business credit.

FORBES: The Chimera Of The Fed's Schizophrenic Mission

Patent laws stymie growth by creating huge barriers to entry for new entrants and, in some cases, by crowding out current competitors.

FORBES: The Problem With Patents

The current crop of reality shows crowding the autumn schedules should drive rewards down even further.

ECONOMIST: Celebrity economics