as light as thistledown的用法和樣例：
例句
- The coated papercone is extremely light but still extremely stiff and effectively reduces resonances.
其塗層紙紙盆具有質量極輕，剛度極高的特點，能夠有效減少諧振。 - Her footfall was as light as that of some graceful wild animal, and there was no fear of that airy step awakening any echo upon the carpeted stone corridors and staircase.
她落腳極輕，就象某些優雅的野獸一般，無需擔憂這樣輕靈的腳步會在鋪著地毯的走廊和樓梯上引起任何迴響。
