Nautical A vertically hinged plate of metal, fiberglass, or wood mounted at the stern of a vessel for directing its course.

垂直的有铰链的圆盘，用金属、玻璃纤维或木头制成，置于船头之上以调整方向。

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The choice of right template, the mechanism of tem- plate, the structure-directing role of template and its effect on the pore size of titanosilicate sieves are also discussed.

讨论了模板剂在分子筛合成过程中的选取和作用机理，模板剂对分子筛孔道大小的影响及结构取向作用。

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