新用户需要协助：SL 查看器比较复杂，新用户必须经过高强度的短期学习以便快速熟悉 SL 界面。
New users require assistance: The SL viewer is complex and new users must negotiate a relatively steep learning curve to become skilled with the SL interface.
本文总结了在短期单调荷载作用下混凝土的破坏机理，断裂韧度和强度理论方面的研究成果。
This paper summed up the recent works about failure mechanisms, fracture toughness and failure criteria of concrete which are monotonously loaded in a short-term.
要劳逸结合，高强度的训练之后，能量在短期之内爆发，之后就需要通过休息和复原来进行能量的补偿。
Interval training is built on short bursts of high intensity exercise offset by rest and recovery.
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