断断续续

I learn Engligh off and on for 4 years.

我断断续续学了四年英语了。

I have been learn english off and on for four years!

我断断续续学了四年英语了。

I learn the English off fwe seasons.

我断断续续学了四年英语了。

Both masker and probe were ramped on and off to avoid spectral splatter.

心理物理测量在依据以下情况实行：（1）频率1000赫兹、反应时间20毫秒的探测音其声音位准高于静音临界15分贝(如15分贝的感觉层次)，（2）将反应时间300毫秒的遮蔽音，其位准调整到可听闻试验中75%的探测音(如探测音仍然在其"遮蔽门槛"内)，遮蔽音和探测音两者断断续续地跳动，以避免频谱散射。3。

Part of the reply reached my ears."Yes," Mr McCallum said,"she's a good girl. I've been meaning to suggest keeping her on..."

我断断续续地听到了一些McCallum先生的答话："是啊，她是个好女孩，我也在考虑着提议留用她…。"

I have learned English for 4 years off and on.

我断断续续学了四年英语了。

I have studied english for 4 years off and on.

我断断续续学了四年英语了。

I have been studying english for 4 years off and on.

我断断续续学了四年英语了。

I have been learning english off and on for four years.

我断断续续学了四年英语了。

I have been learning english on and off for four years .

我断断续续学了四年英语了。

This brought fixed cost, but it also is meant at the same time use a source to won't make you singlehanded assume a problem.

这带来了一定的成本，但它同时也意味着使用开源不会让你独力承担问题。

He gained a small fortune in real estate.

他在房地产上发了一笔小财。