Any foreign company's oil and gas exploration activity in the waters under China's jurisdiction without China's permission is illegal and invalid.

任何外国公司在未经中国允许的情况下，在中国管辖海域从事油气勘探活动，都是非法、无效的。

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During high school, we should at least assign a thorough mathematical modeling and mathematical exploration activity.

高中阶段至少各应安排一次较完整的数学建模、数学探究活动。

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As exploration activity in Damintun has entered into middle - late stage, basement hydrocarbon reservoir will be the main target for further exploration.

大民屯凹陷已进入油气勘探中后期，基岩油气藏为下一步勘探的主战场。

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As hydrocarbons run short, rising prices tend to spur both innovation and new, more expensive exploration activity.

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Halliburton also continued to maintain a positive outlook for exploration activity in North America despite the recent declines in oil prices and turbulence in international markets.

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The higher utilization could be a result of a resurgence in deepwater activity in the U.S. Gulf of Mexico, where the government recently sold leases for new exploration activity.

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