名词作竞选演说者，难题
1. 竞选演说者：stumpage 未砍伐的树 | stumper 竞选演说者 | stumpy 多残株的
2. 伐木机：stump work 斯顿艺术刺绣 | stumper 伐木机 | stunt film camera 特技摄影机
3. 除根机：stump puller 除根机 | stumper 除根机 | stylus 触针
1. The main stumper is the nature of the naked-eye star -- the one that dims and brightens.
难题主要在肉眼可见的主星的明暗变化。
2. STUMPER a stumper. A knotty problem.
的确的确。一个棘手的问题。
3. A stumper with required structures is pressed into the surface of polymeric foil and heated to a temperature above its glass transition temperature under suitable pressure until the temperature droped below the glass transition temperature of the polymer, followed by removal of the stumper and left the structures of the stamper in the polymeric foil.
将聚合物加热到其玻璃转化温度以上，利用预先制备好的模板在适当的压力下压向聚合物样品，保持压力直到聚合物温度降到玻璃转化温度以下，将模板移去后，模板上图形便转移到样品表面。
4. This kind of classification that comes from the system of civil law has no actual senses to us. Our criminal code stipulation concerning fault can resolve the discernment stumper problem.
来自大陆法系的这种分类，对于我们没有实际意义，我国刑法关于罪过的规定就能解决认识错误问题。
5. The temporal problem in Geographical Information System (GIS) is a very important stumper to be solved. The Main difficulty in the problem is to construct a Spatio-Temporal Data Model (STDM).
时态GIS研究很重要，但也是一个尚未解决的难点问题，其中的核心是时空数据模型的研究。