将热的小苏打和水的混合物倒入锅子里，完全覆盖银器。
Pour the hot baking soda and water mixture into the pan, and completely cover the silver.
在二迭纪末时期，南极比现在的位置往北偏一些，比今天热一些，没有覆盖永久冰川。
At the time of the end-Permian extinction, Antarctica was some distance north of its present location, warmer than it is today, and not covered with permanent glaciers.
刮奖专家以印好的编码作为标记，并在上面覆盖一层可以挂掉的特殊涂层（可以使用热变色油墨或其他安全油墨）。
The scratch-and-win specialist marks the keys with printed codes and covers them with a special scratch-off layer (thermochromatic or other security inks could be used).
应用推荐