n.限制，限定，约束，严管

原形：constraint复数：constraints

Eric felt constraint in her presence.
埃里克在她面前显得很拘束。
Mary tried to appear friendly, but her constraint was obvious.
玛丽尽力显得友好，可是显然很拘束。
Tom sat down, at first, with some constraint and awkwardness.
汤姆刚入座时还感到有点拘束和别扭。
The project must be completed within a year, due to a tight time constraint.
由于时间限制，项目必须在一年内完成。
Budget constraints have forced the company to reduce its marketing expenses.
预算限制迫使公司减少了营销开支。
The new policy aims to ease traffic congestion by imposing constraints on vehicle use in the city center.
新政策旨在通过限制市中心的车辆使用来缓解交通拥堵。
Due to resource constraints, we had to prioritize which features to include in the software update.
由于资源有限，我们不得不优先考虑在软件更新中包含哪些功能。
The designer worked creatively within the physical constraints of the small apartment space.
设计师在小公寓空间的物理限制下创造性地工作。
There are legal constraints that prevent the government from accessing citizens' private data without a warrant.
有法律规定限制政府在没有授权的情况下访问公民的私人数据。
The experiment was conducted under strict ethical constraints to ensure no harm came to the participants.
实验在严格的道德约束下进行，确保不会对参与者造成伤害。
Financial constraints often hinder start-ups from investing heavily in research and development.
财务限制常常阻碍初创企业大量投资于研发。
The school operates under the constraint that it must maintain a certain student-teacher ratio.
学校必须遵守保持特定师生比例的限制条件来运作。
Environmental constraints, such as protecting wildlife habitats, guided the route selection for the new highway.
环境限制因素，如保护野生动物栖息地，指导了新高速公路路线的选择。