In wood, the grain is the pattern of lines you can see — the way the tree grew. A piece of wood is cross-grained when those lines run across it, not along its length.

In wood在木頭裡 the grain木紋 is是 you can see你看得到的 the pattern of lines線條紋路 the way the tree grew也就是樹生長的方式 when當 those lines這些紋路 run across it橫著跑過木頭 not along its length而不是順著長度方向的時候 A piece of wood一塊木頭 is cross-grained就是橫紋的

That kind of board is harder to cut and plane smoothly, and it may twist or split more easily as it dries. Carpenters watch for it because a cross-grained piece does not behave like a straight-grained one.

That kind of board這種木板 is harder to cut and plane smoothly比較難切割和刨平 as it dries乾燥的時候 it may twist or split more easily也比較容易翹曲或裂開 Carpenters watch for it木匠會特別注意 because因為 a cross-grained piece橫紋的木材 does not behave like表現不像 a straight-grained one順紋的木材

The word is about the direction of the lines in the wood, not about whether the wood is “good” or “bad” in a moral sense.

The word這個詞 is about說的是 the direction of the lines in the wood木頭裡紋路的方向 not about不是在說 the wood木頭 in a moral sense在道德意義上 is “good” or “bad”是「好」或「壞」

(You may also hear an older, rarer use about a person who is awkward and hard to please. That is not this meaning.)

You may also hear你也可能聽過 an older, rarer use一個比較舊、比較少見的用法 about a person是在講一個人 who is awkward and hard to please難搞、不好取悅的 That那 is not this meaning不是這裡的意思