Stent - Versus - Stent Equivalency Trials: Are Some Stents More Equal Than Others?支架与支架的相等同试验: 是否有些支架的等同优于其他一些支架?First, some properties of equivalency of default theories are proposed.首先, 得到了若干关于缺省理论等价的性质.The method of e...
大家一定都很熟悉玫瑰中的老牌名品“水晶宫殿”。Everyone must be familiar with the old favourite among roses, Crystal Palace.希腊人认为紫水晶可以防止人喝醉。Amethyst was believed by the Greeks to protect a person from drunkenness.每个房间的天花板上都悬有枝形水晶吊灯。Crystal chan...