Nobody gets to be an octogenarian without sometimes feeling heavy-limbed and in need of a prop (usually in the form of a chair).
没有人在耄耋之年不会时而手脚笨拙,也不需要支撑物(通常是椅子)的。
We would like to honor your impact in the form of a one-time grant of five laptops to be given to your top 2 male and top 2 female math students and your math or computer science department chair.
为了表达对您的敬意,我们一次性向您提供五台笔记本电脑,其中两台提供给学校最出色的男学生,两台提供给最出色的女学生,另外一台提供给学校的数学或计算机部门主管。
The catalyst is a twisted chair structure and reacts with borane at the N site of the catalyst to form catalyst borane adduct. The formation reaction is exothermic.
催化剂具有扭曲的椅式构型,与硼烷在N原子处配位形成加合物,反应是放热的。
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