trail; trial; trailer

整合起來看比較清楚

trail 拖曳、跟蹤
trial 試用、試驗
trailer 預告片、拖車

--
https://www.facebook.com/gavinchangenglish/photos/a.291235594312989.48366.290270787742803/730248303745047/?type=3&theater
https://www.facebook.com/gavinchangenglish/photos/a.291235594312989.48366.290270787742803/731605636942647/?type=3&theater