例句與造句

1. The project started in September 1987 with an advance borehole using state of the art technology.
2. The main drilling started on 8 September 1990 about 200 metres away from the advance borehole for an envisaged depth of 10, 000 metres.
3. It's difficult to find advanced borehole in a sentence. 用advanced borehole造句挺難的