如果使用得当，避孕套是很有效的避孕手段。Condoms are an effective method of birth control if used with care.服务项目包括避孕建议和健康检查，并且免费提供。The service covers contraceptive advice and health checks, and is available free.服用避孕药是最有效的避孕方法。The pill is th...
She blinked in surprise at his agility.他敏捷的身手让她惊奇地直眨眼睛。He tried not to let his irritation show as he blinked in the glare of the television lights.电视镁光灯的强光让他直眨眼睛，他努力不让自己的恼怒表现出来。The light blinked through darkness.那盏灯在黑暗中闪...
The process of alternating solid rock masses is called metamorphism.固体岩体变换的过程即所谓变质作用.Danba area has undergone multiperiod deformation, metamorphism and magmatism since Mesozoic time.丹巴地区自中生代以来经历了多期的变形 、 变质和岩浆作用.The metal...