have a head like a sieve

have a head like a sieve的基本解释

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记忆力极差

与have a head like a sieve相关的网络例句 [注：此内容来源于网络，仅供参考]

Results the nipple surface blood was from central retinal artery,sieve plate former district,sieve plate district and postzone were from short posterior ciliary arteries.sieve plate postzone caliber was the thickest,the surface was the next,sieve plate prezone and sieve plate district were the smallest.conclusion the difference of blood capillary caliber in nipple prompts ischemic lesions occur easily in sieve plate prezone and sieve plate district.

结果 视乳头的血供除表层来自视网膜中央动脉外，其余筛板前区、筛板区和筛板后区主要来自睫状后短动脉。筛板后区口径最粗（7.3±1.4）μm，表层次之（6.2±1.3）μm，筛板前区及筛板区最细（4.9±0.7）μm，（5.0±0.8）μm。结论视乳头各层毛细血管口径不同，提示筛板前区及筛板区容易发生缺血性病变。

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河北省安平县永龙矿山设备有限公司原永龙矿筛网厂）-专业生产不锈钢熔接式矿筛网、条缝筛片、筛板、筛篮、焊接式振动筛网、复合筛网、高频筛、圆筒筛、弧形筛、跳汰机筛板、冲孔筛板、聚氨脂筛板、橡胶扎条筛板、不锈钢网套、尼龙筛片等高强度筛网，及建筑焊接网片、钢格板网，石油用钢板网，铝板网、冲孔网板、电焊网、不锈钢网、汽液过滤网，焊接过滤筒、不锈钢烧结网、过滤盘、金属滤芯。

And the development and formation of the sieve tube elements of the different cultivars were influenced by the different levels of B: the sieve tube elements of the two cultivars were not formed at the level of 0.001mg/L; At the level of 0.01mg/L, the sieve tube elements of the high efficiency (Qingyou 10) cultivar could be formed, but the structure of the sieve tube elements was not complete, and the abruption and differenciation of the sieve tube elements of the low efficiency cultivar were inhibited, they were not formed; At the level of 0.01mg/L, the sieve tube elements of the two cultivars were formed.

不同硼水平下，不同硼效率甘蓝型油菜品种根尖筛管分子的发育与形成受到影响：硼浓度为0.001mg／L时，两个油菜品种都不能形成筛管分子；硼浓度为0.01mg／L时，硼高效品种青油10号筛管分子可以形成，但结构受到破坏，而硼低效品种Bakow筛管分子的分裂与分化受阻，几乎不可能形成成熟的筛管分子；硼浓度为0.5 mg／L时，两个油菜品种都能正常生长发育。

与have a head like a sieve相关的网络解释 [注：此内容来源于网络，仅供参考]

have a head like a sieve：记忆力极差

have a hard head 顽固 | have a head like a sieve 记忆力极差 | have a head 头痛

have a head like a sieve：记忆力很差, 心不在焉

have a head full of bees 想入非非 | have a head like a sieve 记忆力很差, 心不在焉 | have a level head 保持镇定

have a head like a sieve：记忆力很差

Have a head like a sieve 记忆力很差 | Have one's head in the clouds 不现实,想入非非 | Have one's head screwed on the right way 头脑清醒明智,有判断力

have head like a sieve：健忘

56. bind someone hand and foot 使动弹不得,捆住手脚,使受束缚 | 57. have head like a sieve 健忘 | 58. in one's heart of hearts 在心里

to have a head/memory like a sieve; in an absent way; absent-minded：心猿意马

一贫如洗 as poor as a chuich mouse; as poor as Job's turkey; on t... | 心猿意马 to have a head/memory like a sieve; in an absent way; absent-minded | 守口如瓶 as dumb as an oyster; as slient as the gra...