lack的形容词是lucky，副词是luckily；
lucky： adj.有好运的;运气好的;幸运的;好运带来的;带来好运的。
luckily： adv.幸运的是;幸好;好在。
扩展资料
He was lucky to get off with a small fine.
他侥幸逃脱惩罚，交了一小笔罚款了事。
It was lucky for us that we were able to go.
我们能去是我们的.运气好。
From the sound of things you were lucky to find him.
看起来你能找到他真是幸运。
Luckily, nothing valuable was stolen.
幸运的是，没有贵重物品失窃。
Luckily for us, the train was late.
我们真凑巧，火车晚点了。
The accident could have been much worse; luckily no harm was done.
这次事故本来可能糟糕得多；所幸没有造成伤害。
