upstream是什么意思

upstream是什么意思 upstream segment是什么意思? 美国upstream是什么意思 upstream Downstream or Upstream experience是什么意思 请问在石油术语中Upstream,middlestream,downstream是什么意思 Upstream regulators是什么意思?这是分子生物学里面的单词 upstream project upstream pier upstream surge tank 水利行业的词汇。surge tank 我知道是调压井的意思，不过加上upstream或者downstream真是想不出是什么意思了。 Learning is like rowing upstream:not to advance is to drop back 中文是什么意思啊 谁能帮帮我 upstream activities是什么意思?全句是Right now,upstream activities account for 60 per cent of the total export value,while the rest is downstream activities.Under Natip,we want to reverse the portion, Chin said at a briefing in Putrajaya yes 【英文翻译】Further upstream,a fisherman got mail. Learning is like upstream,not degrade! upstream and downstream assets英文怎么翻译 The proxy server received an invalid response from upstream server.-------------------------------------------------------------------------------- The proxy server received an invalid response from upstream server. gateway received an invalid response from the upstream gateway 翻译