Costa Rica becomes a signatory to the Buenos Aires copyright treaty.1916年,哥斯达黎加成为布宜诺斯艾利斯版权条约的签字国之一....banana plantations in Costa Rica.哥斯达黎加的香蕉种植园Here, a female floats through a cloud forest in Costa Rica.这里, 一雌性漂浮物通过云雾林...
It is a painful experience having the boil lanced.把疖子切开是很痛的。He found the transition to boarding school excruciatingly painful.他发现转到寄宿学校极其痛苦。It was nowhere near as painful as David had expected.这远不如戴维所料想的那么痛苦。...
Sometimes augmentative surgical procedures are necessary.有时增加的外科程序是必需的.Objective To advance augmentative rhinoplasty skills on different nose - shapes and the aesthetic effects and prevent complication.目的:为了提高对各鼻形的隆鼻技术,预...
最后DNA连接酶将新合成的DNA链与原来的链接上.Finally, DNA ligase newly synthesized DNA chain and the original links.方法载体的构建采用限制性内切酶酶切、4DNA连接酶连接等方法.Methods: The restriction endonuclease and T 4 DNA ligase were used to construct the vector pl...