He stooped down, cut the stem for her with his knife and handed her the flower.

他弯下腰，用刀替她割下花茎，然后把花递给她。

《柯林斯英汉双解大词典》

But you have no idea of where each branch, leaf, stem and flower will be a year from now, and if you say you do then you're really only guessing.

但是，你完全不知道一年后每个枝条、叶子、树茎和花朵将会长成什么样子。除了随意猜猜之外你又能说出个什么所以然来呢。

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Finally, if you are wanting a "long stem," use a stick and attach to the flower by wrapping it with a bit more florist tape.

最后，如果你喜欢长枝条，可以用胶布把一根树枝和做好的花朵缠起来。

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