大家都搜：
持续下降
1、have kept───已经保持（keep的现在完成时）
2、kept───v.保持，处于；继续；耽搁；保留，留着；存放；开设，经营；保守（秘密）；遵守（诺言）；记（日记），做记录；供养，包养；保护，使免受（keep的过去式和过去分词）；adj.被资助的，（尤指）被包养的
3、kept away───防范；不接近
4、are kept───保留
5、falling───v.落下；跌倒；减少；（建筑物、地方）沦陷；进入某种状态（fall的现在分词）；adj.（规模、数量等）下降的；减少的；落下的；n.(Falling)（美）法林（人名）
6、falling through───落空；失败
7、falling along───沿……下降
8、falling over───倒伏，极度倒伏；远弹着；极度倒伏
9、kept from───隐瞒；阻止；抑制
1、pen kept falling off the table and I kept putting it back.───钢笔不断从桌上落下而我不断将钢笔放回桌子上。
2、hate and love. . . she just kept falling into a dream of words as the music continued to play.───恨与爱…她不过是在不休止的音乐中跌落入词的梦境里。
3、During the first week wires kept falling off from her body and were gone.───丝生长第一周时曾经出现过脱落迹象，甚至完全消失。
4、the soap and all my bits and pieces kept falling off the sink because the train was rocking so much.───由于火车晃动得如此厉害，以致于我的肥皂等零碎东西不断从水池上掉下来。
5、He was just a toddler and he wasn't very good at it, and he kept falling over.───他还只是个学步而且并不擅长这个的小孩，他就一直摔倒。
6、My sister got some platform shoes for her birthday but they were so big that she kept falling over!───我姐姐（妹妹）过生日那天收到一些厚跟鞋，不过它们太大了，她一直摔个不停！
7、The shower door was slightly dodgy and kept falling off its runner - nothing major but enough to be irritating after a few times.───浴室的门也不太稳，经常掉-虽然不是什么大问题，但是次数多了也很烦人。
8、He tried carting along a remote-controlled helicopter, but it kept falling on him from a shelf in the truck.───他试过随车携带一架遥控直升飞机，但这架直升飞机总是从卡车里的架子上掉到他身上。
1、He kept falling down , however, and eventually decided to sleep off.
2、My tank top kept falling off my shoulders as we flew down the stairs.
3、What made it so comical was that their hats kept falling off.
4、He then tried propping the others up on the climbing frame but they kept falling off.
5、They were mocking him because he kept falling off his bike.
6、Until the end of summer we kept falling back with the ground forces until the front stabilized on the river Don, on whose bank we were deployed right up to the beginning of the counteroffensive.
7、The toddler tried to walk but kept falling down.
8、I kept falling asleep at the wrong time like an old tramp.
9、Her stringy black hair kept falling in her eyes.