skylark

a skylark was trilling overhead.

只云雀在鸣。

he was skylarking with a friend when he fell into a pile of boxes.

当他掉入子堆时，他正朋友嬉闹。

in February, 1957, the test fire airborne skylark 1 rocketsonde, it could deliver for the first time 100 kilograms loads 175 kilometers upper airs.

1957年2月，首次试射云雀1型探火箭，它能将100公斤的载荷送到175公里的高。