The problems were immense ​ — torrential rains, landslides, and mudslides, as well as tunneling through solid rock and, even more difficult, lithomargic soft soil, described as being like toothpaste.
Masalah - masalah yang mesti dihadapi cukup besar ​ — hujan deras, tanah longsor, dan banjir lumpur, juga membuat terowongan menembus cadas padat dan, yang lebih sukar lagi, menembus tanah lembut litomargis, yang katanya mirip odol.