We can use another form of variable expansion to select a specific substring, based on a specific character offset and length. Try typing in the following lines under bash.
可以根据特定字符偏移和长度，使用另一种形式的变量扩展，来选择特定子字符串。
For example, the "! "character is the history expansion character, which bash normally replaces with a previously-typed command.
例如，“ ！ ”字符是历史扩展字符，bash通常将其替换为前面输入的命令。
You will notice that on a US keyboard, shift-4 is "$", which is the bash variable expansion character.
注意到了吗：在美国键盘上，shift-4是 "$"，它是bash变量扩展字符。
The special character of these cells is the striking arrangement of their nerve filament [axon], which arises from the cell body but also very often from any thick, protoplasmic expansion [dendrite].
这些细胞的特点是它们令人瞩目的神经纤维(即轴突)，这些结构大多从胞体上生出，但是从浓密的原生质衍生物(即树突)上生出的情况也很常见。
Furthermore, the character that expansion rate and expansion time in VF concrete anti-crack additive can be controlled artificially and the effects in engineering application have been explained.
尤其是对VF防裂剂的膨胀时间和膨胀量人为可控的特点及由其制作的补偿收缩混凝土在实际工程中应用的效果作了详细的论述，结果表明均取得了理想的防裂效果。
The absence of personal motor traffic allows for the expansion of programs and the creation of a space with its own character.
没有了个人交通工具，就能够进行扩展，创建独具特色的空间。
Part of the problem is we keep offering new character levels along with new talents, so each expansion ends up constraining you more and more to one tree.
部分原因在于我们不断推出新的性质水平和新的人才，因此每个扩大最终制约你越来越一棵树。
Using AB-8 resin as solid phase, the expansion character and liquid mixing performance in the expanded bed were studied.
以AB - 8大孔树脂为固相，对膨胀床的膨胀特性及流体混合性能进行了研究。
Range expansion of the original plants was likely the main genetic differentiation model for the formation of genuine character of Chuanwu.
基原类群分布区的快速扩张可能是川乌药材道地性形成的主要遗传分化模式。
Can it even be said that community character and community social "kink" along the development of China's "modernity" of the generation and expansion of the central element.
甚至可以这么说，社群人格与社群社会的“扭结”沿展就是中国“现代性”的生成和拓展的中心内容。
With the expansion of this special network context, the character "Qin" has covered a lot of new meaning in the original semantic foundation.
随着网络这一特殊语境的扩张，“亲”字在原有语义的基础上衍生出了许多新义。
In order to repair the seal character defect, we establish three benchmarks image to find the defect's location and repair it using thinning and expansion algorithm.
针对提取出的圆形印鉴印文缺损，本文建立了三个基准图像，运用形态学的细化算法及膨胀运算对其进行处理，找到缺损位置并进行补偿。
The expansion will include some additional character-customization options for players as well.
这个资料片还包括一些额外的玩家定制选项。
The expansion will include some additional character-customization options for players as well.
这个资料片还包括一些额外的玩家定制选项。
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