... period of combustion 燃烧时间 period of contact啮合延续时间 period of exhaust 排气时间 ...
2
?接触期间
... 压缩期 period of compression 接触期间period of contact 循环周期 period of cycling ...
双语例句
1
After a long periodofcontact, she developed trust in him.
经过长时间接触，她对他产生了信任感。
2
I work with the client in order to acknowledge that it was a professional experience, but I usually have a periodof no contact with a client for a couple of months.
我和客户行事是因为它是一个职业，而我从事这一职业。常常，我同客户几个月没有联系。
3
More than 40 people who have had direct contact with the suspected cases will continue to be monitored for a periodof 21 days from the last date of their exposure (19 June).