镇静地应付了困难的局面.Carried off the difficult situation with aplomb.她从惊慌中恢复过来, 并且镇静地给予了回答.She recovered from her surprise, and answered calmly.我十分镇静地逃了出来.I had much presence of mind to bring myself off....
Tritium is one of the mildest radioactive isotopes.氚是最和缓的放射性同位素之一.More reactive are the heavier isotopes of hydrogen, deuterium and tritium.更为活跃的是氢的较重同位素, 氘和氚.Tritium has a half - life of 12.4 years.氚的半衰期为12.4年,地球形成时的氚早已...
They are not second - order approximations, but are exact for any amount of deformation.它们不是二次近似, 而是对任何变形量都成立的精确表达式.We do not have the true figures so we will have to make some approximations.我们没有真实的数字，因此只能作些粗略的估计。There ...
她眼光一闪，但他举起一只手说：“让我把话讲完。”Her eyes flashed, but he held up a hand. "Let me finish."卢克的妈妈收起了笑容，用责备的眼光看着他。Luke's mother stopped smiling and looked reproachfully at him.这使他倾向以批判眼光看待我们的传统。This has given him a disposition ...