1) Don't cross the picket line!
不得越过警戒线!
2) To rest on one's arms
警戒不怠
3) warning line
警戒线
1.
For case study, Three Gorge Rservoir Area is investigated and the warning lines of main target are determined for states and social function,economic function and environmentul function of this system.
从系统与环境相统一的角度，研究了农业生态经济系统的模型、特征、预警分析的意义和内容；以三峡库区为例，从系统序化的观点，确定了这个系统的社会、经济、环境功能和状态的主要指标的警戒线；并与这些指标的现状、过去与未来趋势值进行对比；分别对现状预警、趋势预警和突变预警进行了评价；最后作了简易的对策探讨。
2.
The present situation of representative quantitative indexes for main factors of natural environment of agriculture in a broad sense is analysed,and compared with the warning lines of these indexes from a veiw of systematic ordering.
从系统序化的观点，分析了库区大农业主要环境因子的具有代表性指标的数量和警戒线，并进行了对比。
3.
The early-warning index sign and warning lines should be taken to set up a practical early-warning mechanism of anti-dumping in this text,in order to avoid or reduce the anti-dumping indictment from the origins.
因此,应选取预警指标和警戒线来构建一套反应灵敏、科学实用的反倾销预警机制,以便从源头上避免或减少国外对我国产品的反倾销起诉。
4) Not getting over's the boundary of a country.
不要越过国境线。
5) No parking beyond
越过此处不得停车
6) cordon off
布置警戒线戒严
补充资料：不得
1.不能得到;得不到。 2.不能;不可。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条