If you are not pretty like the sense of accomplishment, and very persistent, not easily discouraged, the underlying purpose of the system you can grow every day, immersed in their digital system design, feel they are very strong Nianye.
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I had to be really persistent and it was very hard work.
我必须非常坚持，这是非常艰难的工作。
Although PCBs have a low immediate toxicity, they are very persistent in the environment and accumulate in tissues over time.
虽然氯联苯没有很强的直接制毒性，但是它们能长期存留在环境中，并积存在人体组织里。
Non-persistent messages are processed in memory and are very fast, but may be lost in the event of a system failure.
非持久化的消息是在内存中进行处理的，速度很快，但可能会因系统故障而丢失消息。
"Turkey's persistent denial and inability to face, or unwillingness to face up to its history is very disruptive in all kinds of ways - in terms of international relations, in terms of its own internal politics - and it also prevents it from really recognizing how do you deal with minorities."
VOA: standard.2010.03.19
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