主桅帆 meaning in English

mainsail

The ship drew on and had safely passed the strait , which some volcanic shock has made between the calasareigne and jaros islands ; had doubled pom gue , and approached the harbor under topsails , jib , and spanker , but so slowly and sedately that the idlers , with that instinct which is the forerunner of evil , asked one another what misfortune could have happened on board
尽管船上扯起了三张主桅帆，一张大三角帆和一张后桅帆，但它驶得非常缓慢，一副无精打采的样子，以致岸上那些看热闹的人本能地预感到有什么不幸的事发生了，于是互相探问船上究竟发生了什么不幸的事。