... marker system 标志信号系统 mark-hold 传号保持 marking and spacing interval 传号和空号区间 ...
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Finally, he finds a tripod used to hold work lamps and places it above the mark on the floor.
最后,他找到一个用来挂工作灯的三脚架,将它放在地上所标记的位置。
While it is unusual for people of that age to hold down a job, it is becoming more and more common to reach the 100-year mark.
活到100岁的人越来越多,可是活到那个年纪还可以继续工作,就非同寻常了。
We will hold a concert to mark the composer's 60th birthday.
我们要举办一个音乐会来庆祝作曲家诞辰60周年。
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