似稳定

The volcanic eruptive sequence established for South Shetland Islands region since A.D.1650 shows that 7 volcanic eruptive cycles could be distinguished during the past 340 years,as covered by the ice core.

依冰芯记录判断，该区 1 650年以来的 340年间，共有 7轮火山喷发。1 875～ 1 92 5年间似为火山活跃期，喷发地点可能主要在欺骗岛；1 650～ 1 80 0年间为一相对平静期；此后一个世纪不太稳定；而过去的 1 0 0年间基本平静，只是世纪初和 50～ 70年代间各有一段动荡期。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。