Tunnelling under the english channel is a big .

在英吉利海峡海底凿隧道是一个大问题。

Tunnelling in the opposite direction .

在相反的方向掘进。

For example , luca gammaitoni , a physicist at the university of perugia in italy , recently unveiled a type of switch known as a resonant tunnelling diode that benefits from noise in exactly this way .

比如lucagammaitoni，意大利佩鲁贾大学的一名物理学家，最近展示了一种被叫做共振隧穿二极管的开关，这种开关就是以刚刚提到的方式利用噪音。

Tunnelling is the awarding of contracts to firms owned by family members .

隧道行为是指通过与家族成员的公司订立合同而使之受益。

The numerical results are compared with those from centrifuge model tests , in which six single and nine twin tunnelling cases are considered .

数值分析结果与六组单隧道离心机模型和九组双隧道离心机模型之试验结果进行比较验证。