project workers this week began exploratory works in the riverbed outside the palace of westminster, where a borehole was sunk to analyse the ground conditions facing engineers digging the tunnel.
项目工人本周在威斯敏斯特宫的河床外,已经开始了探索性的工作。在那,他们用鉆孔机深入地下,以此来分析工程师挖隧道将面对的地面状况。