They have an extra heavy burden to bear.
他们需要背负更重的担子。
Does the luggage you take on vacation feel extra heavy these days?
这些日子外出度假有没有感觉行李特别沉？
The reservoir belongs to the huge massive block extra heavy oil reservoir.
油藏类型为巨厚块状特稠油油藏。
The reservoir belongs to the huge massive block extra heavy oil reservoir.
油藏类型为巨厚块状特稠油油藏。
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