因为这是我第一次坐飞机，所以我满心欢喜。
Since this was my first time to take theplane, I was filled with joy.
youdao
Since this was my first time to take the plane, I was filled with joy.
这是我第一次乘坐飞机。
This is my first time to take a plane.
这是我生平第一次坐飞机。
This is my first time ever to take a plane.
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