seasickness

例句：

1. 1. He was so seasick that he couldn't even stand up straight.
   他晕船得厉害，连直起腰都做不到。
2. 2.She had to endure a long flight on the plane before she could get some relief from her seasickness.
   在飞机上待了很长时间后，她才从晕船中得到了些许缓解。
3. 3. The captain warned everyone about the dangers of seasickness during the long voyage.
   船长警告大家在长途航行中要注意晕船的危险。