threshed的音标？

The corn was still sown, cut and threshed as it was a hundred years ago.玉米的播种、收割、脱粒方法还和一百年前一样。When the wheat is headed it is reaped and threshed.麦子熟了,就把它收割脱粒了.It was difficult to obtain clean grains when the crop was thr...

v.打（麦等）( thresh的过去式和过去分词 )，脱粒，反复地做，推敲...