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- Leaf gap (lacuna) A region of parenchyma differentiated in the stem vascular cylinder immediately above a diverging LEAF TRACE. Lateral connections insure no break in the vascular system. 叶隙：叶迹从中柱分出的上方，初生维管柱上方出现的一些薄壁组织细胞，与茎的维管柱结构不同，它的侧向连接保证了茎叶维管系统的连续。
- Do not leave gaps in your study plan. 学习计划在时间上要有连续性,不能有间断。
- Protostele A simple form of stele, uninterrupted by leaf gaps, consisting of xylem in the center completely surrounded by phloem. 原生中柱：中柱的一种简单类型。
- Intermediate between these is the solenostele in which the leaf gaps are more widely spaced vertically so that only one is seen per cross section of the stem. 各种中柱排列方式在植物中有很大的差异性，从叶隙消失的原生中柱到联系有许多叶隙的复杂网状中柱。
- The girl found a gap and squeezed in. 小女孩找了个空子挤了进去。
- There is a generation gap between my parents and I. 我父母和我之间有代沟。
- The olive leaf is a badge of peace. 橄榄叶是和平的象征。
- Stellar arrangements vary considerably in plants from the simple protostele, in which leaf gaps are absent, to the complex dictyostele, in which there are many closely spaced LEAF GAPS. 根部的中柱有一个维管组织的中央核心，用以对抗拉应力。
- How can we bridge the gap between rich and poor? 怎样才能缩小贫富之间的差距?
- They planed to narrow the gap between imports and exports. 他们计划缩小进出口的差额。
- The new series of golf holidays fill a gap in the market. 新的高尔夫度假系列填补了市场的一个空白。
- The gap between the rich and the poor has widened. 贫富之间的差距扩大了。
- A big gap yawned between the rocks. 岩石间豁开一个大裂口。
- The road goes through a gap in the hills. 这条路穿过两条山脉之间的峡谷。
- I saw him take a leaf out of the book. 我看见他从书上撕下一页。
- A narrow gap or pass between hills or woods. 小路山间或林间狭窄地带或通道
- The maple leaf is the emblem of Canada. 枫叶是加拿大的象征。
- An open space or a break in continuity; a gap. 空白，空处连续中的空处或中断; 间断
- The trees and shrubs were in full leaf. 那些树和灌木枝叶茂盛。
- I filled in a gap in the conversation by telling a joke. 我讲了一个笑话，填补谈话中出现的冷场。
- 今日热词
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries
