一项费力测量了整个非洲大陆上近7万棵树木周长的研究显示，热带森林吸收的碳排放比我们认识到的要多。
A laborious study of the girth of 70, 000 trees across Africa has shown that tropical forests are soaking up more carbon dioxide pollution that anybody realised.
而水上桩基工程相对陆上桩基工程而言，由于其桩中坐标一般无法预先在实地标定，故其测量定位过程相对复杂。
The aquatic pile foundation measurement is more complex than the land foundation measurement because the aquatic pile foundation can not be pre-calibrated in the field.
该系统主要用于陆上、海洋平台等方面的定向钻进，可以精确地了解钻头的航向，还可以测量钻头处的温度和磁场强度。
It is used to control the drilling direction of the land or offshore platforms. It can provide accurate drilling direction and measure the temperature and magnetic intensity around the drill.
大陆上的现有三角测量系统还须平差。
Existing continental triangulation systems also still need to be adjusted.
相对于陆上同类测量而言，海底大地电磁探测成本高，作业难度大，且不易实施数据采集的重复观测。
Compared with continental operation, there are higher risk and expenses in detecting and more difficult in acquisition repeatedly on the marine magnetotellurics.
相对于陆上同类测量而言，海底大地电磁探测成本高，作业难度大，且不易实施数据采集的重复观测。
Compared with continental operation, there are higher risk and expenses in detecting and more difficult in acquisition repeatedly on the marine magnetotellurics.
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