Directing an actor in line delivery is an essential skill for playwrights and directors.
对于导演和剧作家来说，指导演员表达对白是一项必备的技巧。
2
Through the analyses of causation of leakage in long distance water transferring line, this paper puts forward relevant treatment methods which can provide reference for directing practice.
本文通过对长距离输水干线漏水原因的分析，提出了相应的处理办法，具有指导实践的参考价值。
3
This technique can be used for on-line measuring of main salt concentration and thus directing production.