occluded area 由于几何形状限制，金属表面某些局部区域内的腐蚀溶液虽然与外部溶液保持连通，但内外溶液不容易相互交换的区域。 常见的在蚀孔和缝隙内部及应力腐蚀裂纹内部。由于金属离子水解使溶液酸化和外部的氯离子向内部迁移，闭塞区内部的溶液酸性较强且氯离子浓度较高，腐蚀性明显比外部强。
解决方案：明确区分三种住宅，位于那些寂静的闭塞区，或位于繁忙的街道上，抑或是或多或少的居于两者之间。
Resolution: Make a clear distinction between three kinds of homes-those on quiet backwaters, those on busy streets, and those that are more or less in-between.
首先，为了得到真正的有机蜜，蜂箱必须放置在隔离人口密集，工业区，交通闭塞，农田，化学处理厂及垃圾填埋场处。
First, in order to be truly organic, the beehives must be placed in isolated areas miles from the dense population, industry, traffic congestion, farm fields, treated with chemicals and landfills.
目的观察交界区脑梗死与颅内外主要动脉狭窄或闭塞的关系。
Objective To observe the relationship between cerebral border zone infarction and cerebral artery stenosis or occlusion.
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